Polar bear

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This article is about the animal. For other uses, see Polar bear (disambiguation).

Polar Bear
Conservation status
Vulnerable (IUCN 3.1)[1]
Scientific classification
Domain:	Eukarya
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Family:	Ursidae
Genus:	Ursus
Species:	U. maritimus
Binomial name
Ursus maritimus Phipps, 1774[2]
Polar bear range
Synonyms
Ursus eogroenlandicus Ursus groenlandicus Ursus jenaensis Ursus labradorensis Ursus marinus Ursus polaris Ursus spitzbergensis Ursus ungavensis Thalarctos maritimus

The polar bear (Ursus maritimus) is a bear native largely within the Arctic circle encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the world's largest land carnivore and also the largest bear, together with the omnivorous Kodiak bear, which is approximately the same size.^[3] An adult male weighs around 350–680 kg (770–1,500 lb),^[4] while an adult female is about half that size. Although it is closely related to the brown bear, it has evolved to occupy a narrow ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet.^[5] Although most polar bears are born on land, it spends most of its time at sea, hence its scientific name meaning "maritime bear", and can hunt consistently only from sea ice, spending much of the year on the frozen sea.

The polar bear is classified as a vulnerable species, with 8 of the 19 polar bear subpopulations in decline.^[6] For decades, unrestricted hunting^{[clarification needed]} raised international concern for the future of the species; hunting is now regulated, although with conflicts between the various hunting nations about quotas which may mean that the quota level is higher than the special reproduction rate and populations anyway may be continuing to shrink due to collapse of the populations of their prey due to overfishing.^{[citation needed][original research?]}

For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and the hunting of polar bears remains important in their cultures.

The IUCN now lists global warming as the most significant threat to the polar bear, primarily because the melting of its sea ice habitat reduces its ability to find sufficient food. The IUCN states, "If climatic trends continue polar bears may become extirpated from most of their range within 100 years."^[7] On 14 May 2008, the United States Department of the Interior listed the polar bear as a threatened species under the Endangered Species Act.

Contents [hide] 1 Naming and etymology 2 Taxonomy and evolution 3 Population and distribution 4 Habitat 5 Biology and behavior 5.1 Physical characteristics 5.2 Hunting and diet 5.3 Behavior 5.4 Reproduction and lifecycle 5.4.1 Maternity denning and early life 5.4.2 Later life 5.5 Ecological role 6 Hunting 6.1 Indigenous people 6.2 History of commercial harvest 6.3 Contemporary regulations 6.3.1 Russia 6.3.2 Greenland 6.3.3 Canada and the United States 7 Conservation status, efforts and controversies 7.1 Global warming 7.1.1 Observations linked to global warming 7.2 Pollution 7.3 Oil and gas development 7.3.1 Predictions 7.4 Controversy over species protection 7.5 U.S. endangered species legislation 7.6 Canadian endangered species legislation 8 In culture 8.1 Indigenous folklore 8.2 Symbols and mascots 8.3 Literature 9 See also 10 References 11 Notes 12 External links

Naming and etymology

Constantine John Phipps was the first to describe the polar bear as a distinct species.^[7] He chose the scientific name Ursus maritimus, the Latin for 'maritime bear',^[8] due to the animal's native habitat. The Inuit refer to the animal as nanook,^[9] (transliterated as nanuuq in the Inupiaq language,^[10]. The Yupik also refer to the bear by nanuuk in Siberian Yupik.^{[citation needed]}) The bear is umka in the Chukchi language. In Russian, it is usually called бе́лый медве́дь (bélyj medvédj, the white bear), though an older word still in use is ошку́й (Oshkúj, which comes from the Komi oski, "bear").^[11] In French, the polar bear is referred to as ours blanc ("white bear") or ours polaire ("polar bear").^[12] In the Norwegian administered Svalbard archipelago, the polar bear is referred to as Isbjørn ("ice bear").

The polar bear was previously considered to be in its own genus, Thalarctos.^[13] However, evidence of hybrids between polar bears and brown bears, and of the recent evolutionary divergence of the two species, does not support the establishment of this separate genus, and the accepted scientific name is now therefore Ursus maritimus, as Phipps originally proposed.^[14]

Taxonomy and evolution

Polar bears depend on sea ice as a platform for hunting seals. Large feet and short, sharp, stocky claws are adaptations to this environment.

The bear family, Ursidae, is believed to have split off from other carnivorans about 38 million years ago. The Ursinae subfamily originated approximately 4.2 million years ago. According to both fossil and DNA evidence, the polar bear diverged from the brown bear, Ursus arctos, roughly 200,000 years ago. The oldest known polar bear fossil is less than 100,000 years old. Fossils show that between ten to twenty thousand years ago, the polar bear's molar teeth changed significantly from those of the brown bear. Polar bears are thought to have diverged from a population of brown bears that became isolated during a period of glaciation in the Pleistocene.^[15]

More recent genetic studies have shown that some clades of brown bear are more closely related to polar bears than to other brown bears,^[16] meaning that the polar bear is not a true species according to some species concepts.^[17] In addition, polar bears can breed with brown bears to produce fertile grizzly–polar bear hybrids,^[15][18] indicating that they have only recently diverged and are genetically similar.^[19] However, because neither species can survive long in the other's ecological niche, and because they have different morphology, metabolism, social and feeding behaviors, and other phenotypic characteristics, the two bears are generally classified as separate species.^[19]

When the polar bear was originally documented, two subspecies were identified: Ursus maritimus maritimus by Constantine J. Phipps in 1774, and Ursus maritimus marinus by Peter Simon Pallas in 1776.^[20] This distinction has since been invalidated.

One fossil subspecies has been identified. Ursus maritimus tyrannus—descended from Ursus arctos—became extinct during the Pleistocene. U.m. tyrannus was significantly larger than the living subspecies.^[15]

Polar bears investigate the submarine USS Honolulu 280 miles (450 km) from the North Pole.

Population and distribution

The polar bear is found in the Arctic Circle and adjacent land masses . Due to the absence of human development in its remote habitat, it retains more of its original range than any other extant carnivore.^[21] While they are rare north of 88°, there is evidence that they range all the way across the Arctic, and as far south as James Bay in Canada. They can occasionally drift widely with the sea ice, and there have been anecdotal sightings as far south as Berlevåg on the Norwegian mainland and the Kuril Islands in the Sea of Okhotsk. It is difficult to estimate a global population of polar bears as much of the range has been poorly studied, however biologists use a working estimate of about 20,000-25,000 polar bears worldwide.^[1][22]

There are 19 generally recognized discrete subpopulations.^[22][23] The subpopulations display seasonal fidelity to particular areas, but DNA studies show that they are not reproductively isolated.^[24] The thirteen North American subpopulations range from the Beaufort Sea south to Hudson Bay and east to Baffin Bay in western Greenland and account for about 70% of the global population. The Eurasian population is broken up into the eastern Greenland, Barents Sea, Kara Sea, Laptev Sea, and Chukchi Sea subpopulations, though there is considerable uncertainty about the structure of these populations due to limited mark and recapture data.

Polar bears play-fighting

The range includes the territory of five nations: Denmark (Greenland), Norway(Svalbard), Russia, US (Alaska) and Canada. These five nations are the signatories of the 1973 International Agreement for the Conservation of Polar Bears, which mandates cooperation on research and conservations efforts throughout the polar bear's range.

Modern methods of tracking polar bear populations have been implemented only since the mid-1980s, and are expensive to perform consistently over a large area.^[25] The most accurate counts require flying a helicopter in the Arctic climate to find polar bears, shooting a tranquilizer dart at the bear to sedate it, and then tagging the bear.^[25] In Nunavut, some Inuit have reported increases in bear sightings around human settlements in recent years, leading to a belief that populations are increasing. Scientists have responded by noting that hungry bears may be congregating around human settlements, leading to the illusion that populations are higher than they actually are.^[25] The Polar Bear Specialist Group of the IUCN takes the position that "estimates of subpopulation size or sustainable harvest levels should not be made solely on the basis of traditional ecological knowledge without supporting scientific studies."^[26]

Of the 19 recognized polar bear subpopulations, 8 are declining, 3 are stable, 1 is increasing, and 7 have insufficient data.^[6][22]

Habitat

A cub nursing

The polar bear is often regarded as a marine mammal because it spends many months of the year at sea.^[27] Its preferred habitat is the annual sea ice covering the waters over the continental shelf and the Arctic inter-island archipelagos. These areas, known as the "Arctic ring of life", have high biological productivity in comparison to the deep waters of the high Arctic.^[21][28] The polar bear tends to frequent areas where sea ice meets water, such as polynyas and leads (temporary stretches of open water in Arctic ice), to hunt the seals that make up most of its diet.^[29] Polar bears are therefore found primarily along the perimeter of the polar ice pack, rather than in the Polar Basin close to the North Pole where the density of seals is low.^[30]

A polar bear.

Annual ice contains areas of water that appear and disappear throughout the year as the weather changes. Seals migrate in response to these changes, and polar bears must follow their prey.^[28] In Hudson Bay, James Bay, and some other areas, the ice melts completely each summer (an event often referred to as "ice-floe breakup"), forcing polar bears to go onto land and wait through the months until the next freeze-up.^[28] In the Chukchi and Beaufort seas, polar bears retreat each summer to the ice further north that remains frozen year-round.

Biology and behavior

Physical characteristics

Polar bear skeleton

The polar bear is the largest terrestrial carnivore, being more than twice as big as the Siberian Tiger.^[31] It shares the title of largest land predator (and largest bear species) with the Kodiak bear.^[32] Adult males weigh 350–680 kg (770-1500 lbs) and measure 2.4–3 m (7.9–9.8 ft) in length.^[33] Adult females are roughly half the size of males and normally weigh 150–249 kg (330–550 lb), measuring 1.8–2.4 metres (5.9–7.9 ft) in length. When pregnant, however, they can weigh as much as 499 kg (1,100 lb).^[33] The polar bear is among the most sexually dimorphic of mammals, surpassed only by the pinnipeds.^[34] The largest polar bear on record, reportedly weighing 1,002 kg (2,210 lb), was a male shot at Kotzebue Sound in northwestern Alaska in 1960.^[35]

Polar bears have evolved unique features for Arctic life, including furred feet that have good traction on ice.

Compared with its closest relative, the brown bear, the polar bear has a more elongated body build and a longer skull and nose.^[19] As predicted by Allen's rule for a northerly animal, the legs are stocky and the ears and tail are small.^[19] However, the feet are very large to distribute load when walking on snow or thin ice and to provide propulsion when swimming; they may measure 30 cm (12 in) across in an adult.^[36] The pads of the paws are covered with small, soft papillae (dermal bumps) which provide traction on the ice.^[19] The polar bear's claws are short and stocky compared to those of the brown bear, perhaps to serve the former's need to grip heavy prey and ice.^[19] The claws are deeply scooped on the underside to assist in digging in the ice of the natural habitat. Despite a recurring Internet meme that all polar bears are left-handed,^[37][38] there is no scientific evidence to support this claim.^[39] Unlike the brown bear, Polar Bears in captivity are rarely overweight or particularly large, possibly as a reaction to the warm temperatures of most zoos.

The 42 teeth of a polar bear reflect its highly carnivorous diet.^[19] The cheek teeth are smaller and more jagged than in the brown bear, and the canines are larger and sharper.^[19] The dental formula is:^[19]

Dentition
3.1.4.2
3.1.4.3

Polar bears are superbly insulated by up to 10 cm (3.9 in) of blubber,^[36] their hide and their fur; they overheat at temperatures above 10 °C (50 °F), and are nearly invisible under infrared photography.^[40] Polar bear fur consists of a layer of dense underfur and an outer layer of guard hairs, which appear white to tan but are actually transparent.^[36] The guard hair is 5–15 cm (2.0–5.9 in) over most of the body.^[41] Polar bears gradually moult from May to August,^[42] but, unlike other Arctic mammals, they do not shed their coat for a darker shade to camouflage themselves in the summer conditions. The hollow guard hairs of a polar bear coat were once thought to act as fiber-optic tubes to conduct light to its black skin, where it could be absorbed; however, this theory was disproved by recent studies.^[43]

Polar bear diving in a zoo

A polar bear in a synthetic arctic zoo environment.

The white coat usually yellows with age. When kept in captivity in warm, humid conditions, the fur may turn a pale shade of green due to algae growing inside the guard hairs.^[44] Males have significantly longer hairs on their forelegs, that increase in length until the bear reaches 14 years of age. The male's ornamental foreleg hair is thought to attract females, serving a similar function to the lion's mane.^[45]

The polar bear has an extremely well-developed sense of smell, being able to detect seals nearly 1 mi (1.6 km) away and buried under 3 ft (0.91 m) of snow.^[46] Its hearing is about as acute as that of a human, and its vision is also good at long distances.^[46]

The polar bear is an excellent swimmer and individuals have been seen in open Arctic waters as far as 200 mi (320 km) from land. With its body fat providing buoyancy, it swims in a dog-paddle fashion using its large forepaws for propulsion.^[47] Polar bears can swim 6 miles/hour. When walking, the polar bear tends to have a lumbering gait and maintains an average speed of around 5.5 km/h (3.5 m.p.h.).^[47]

Hunting and diet

The long muzzle and neck of the polar bear help it to search in deep holes for seals, while powerful hindquarters enable it to drag massive prey.^[48]

The polar bear is the most carnivorous member of the bear family, and most of its diet consists of ringed and bearded seals.^[49] The Arctic is home to millions of seals, which become prey when they surface in holes in the ice in order to breathe, or when they haul out on the ice to rest.^[48] Polar bears hunt primarily at the interface between ice, water, and air; they only rarely catch seals on land or in open water.^[50]

The polar bear's most common hunting method is called still-hunting:^[51] The bear uses its excellent sense of smell to locate a seal breathing hole, and crouches nearby in silence for a seal to appear.^[48] When the seal exhales, the bear smells its breath, reaches into the hole with a forepaw, and drags it out onto the ice.^[48] The polar bear kills the seal by biting its head to crush its skull.^[48] The polar bear also hunts by stalking seals resting on the ice: Upon spotting a seal, it walks to within 100 yd (91 m), and then crouches. If the seal does not notice, the bear creeps to within 30 to 40 feet (9.1 to 12 m) of the seal and then suddenly rushes forth to attack.^[48] A third hunting method is to raid the birth lairs that female seals create in the snow.^[51]

Polar bear at a whale carcass

A widespread legend tells that polar bears cover their black noses with their paws when hunting. This behavior, if it happens, is rare — although the story exists in native oral history and in accounts by early Arctic explorers, there is no record of an eyewitness account of the behavior in recent decades.^[47]

Mature bears tend to eat only the calorie-rich skin and blubber of the seal, whereas younger bears consume the protein-rich red meat.^[48] For subadult bears which are independent of their mother but have not yet gained enough experience and body size to successfully hunt seals, scavenging the carcasses from other bears' kills is an important source of nutrition. Subadults may also be forced to accept a half-eaten carcass if they kill a seal but cannot defend it from larger polar bears. After feeding, polar bears wash themselves with water or snow.^[47]

The polar bear is an enormously powerful predator. It can kill an adult walrus, although it rarely attempts to as a walrus can be more than twice the bear's weight.^[52] Polar bears also have preyed on beluga whales, by swiping at them at breathing holes. The whales are of similar size to the walrus and nearly as difficult for the bear to subdue. Most terrestrial animals in the Arctic can outrun the polar bear on land as polar bears overheat quickly, and most marine animals the bear encounters can outswim it. In some areas, the polar bear's diet is supplemented by walrus calves and by the carcasses of dead adult walruses or whales, whose blubber is readily devoured even when rotten.^[53]

With the exception of pregnant females, polar bears are active year-round,^[54] although they have a vestigial hibernation induction trigger in their blood. Unlike brown and black bears, polar bears are capable of fasting for up to several months during late summer and early fall, when they cannot hunt for seals because the sea is unfrozen.^[54] When sea ice is unavailable during summer and early autumn, some populations live off fat reserves for months at a time.^[40] Polar bears have also been observed to eat a wide variety of other wild foods, including muskox, reindeer, birds, eggs, rodents, shellfish, crabs, and other polar bears. They may also eat plants, including berries, roots, and kelp, however none of these are a significant part of their diet.^[52] The polar bear's biology is specialized to require large amounts of fat from marine mammals, and it cannot derive sufficient caloric intake from terrestrial food.^[55][56]

Being both curious animals and scavengers,^[52][57] polar bears investigate and consume garbage where they come into contact with humans.^[52] Polar bears may attempt to consume almost anything they can find, including hazardous substances such as styrofoam, plastic, car batteries, ethylene glycol, hydraulic fluid, and motor oil.^[52][57] The dump in Churchill, Manitoba was closed in 2006 to protect bears, and waste is now recycled or transported to Thompson, Manitoba.^[58][59]

Polar bear males frequently play-fight. During the mating season, actual fighting is intense and often leaves scars or broken teeth.

Behavior

Unlike grizzly bears, polar bears are not territorial. Although stereotyped as being voraciously aggressive, they are normally cautious in confrontations, and often choose to escape rather than fight.^[60] Fat polar bears rarely attack humans unless severely provoked, whereas hungry polar bears are extremely unpredictable and are known to kill and sometimes eat humans.^[53] Polar bears are stealth hunters, and the victim is often unaware of the bear's presence until the attack is underway.^[61] Whereas brown bears often maul a person and then leave, polar bear attacks are more likely to be predatory and are almost always fatal.^[61] However, due to the very small human population around the Arctic, such attacks are rare.

In general, adult polar bears live solitary lives. Yet, they have often been seen playing together for hours at a time and even sleeping in an embrace,^[53] and polar bear zoologist Nikita Ovsianikov has described adult males as having "well-developed friendships."^[60] Cubs are especially playful as well. Among young males in particular, play-fighting may be a means of practicing for serious competition during mating seasons later in life.^[62] Polar bears have a wide range of vocalisations, including bellows, roars, growls, chuffs and purrs.^[63]

In 1992, a photographer near Churchill took a now widely circulated set of photographs of a polar bear playing with a Canadian Eskimo Dog a tenth of its size.^[64][65] The pair wrestled harmlessly together each afternoon for ten days in a row for no apparent reason, although the bear may have been trying to demonstrate its friendliness in the hope of sharing the kennel's food.^[64] This kind of social interaction is uncommon; it is far more typical for polar bears to behave aggressively towards dogs.^[64]

Reproduction and lifecycle

A polar bear swimming

Courtship and mating take place on the sea ice in April and May, when polar bears congregate in the best seal hunting areas.^[66] A male may follow the tracks of a breeding female for 100 km (62 mi) or more, and after finding her engage in intense fighting with other males over mating rights, fights which often result in scars and broken teeth.^[66] Polar bears have a generally polygynous mating system; recent genetic testing of mothers and cubs, however, has uncovered cases of litters in which cubs have different fathers.^[67] Partners stay together and mate repeatedly for an entire week; the mating ritual induces ovulation in the female.^[68]

After mating, the fertilized egg remains in a suspended state until August or September. During these four months, the pregnant female eats prodigious amounts of food, gaining at least 200 kg (440 lb) and often more than doubling her body weight.^[66]

Maternity denning and early life

Cubs are born helpless, and typically nurse for two and a half years.

When the ice floes break up in the fall, ending the possibility of hunting, each pregnant female digs a maternity den consisting of a narrow entrance tunnel leading to one to three chambers.^[66] Most maternity dens are in snowdrifts, but may also be made underground in permafrost if it is not sufficiently cold yet for snow.^[66] In most subpopulations, maternity dens are situated on land a few kilometers from the coast, and the individuals in a subpopulation tend to reuse the same denning areas each year.^[21] The polar bears that do not den on land make their dens on the sea ice. In the den, she enters a dormant state similar to hibernation. This hibernation-like state does not consist of continuous sleeping; however, the bear's heart rate slows from 46 to 27 beats per minute.^[69] Her body temperature does not decrease during this period as it would for a typical mammal in hibernation.^[40][70]

Between November and February, cubs are born blind, covered with a light down fur, and weighing less than 0.9 kg (2.0 lb).^[68] On average, each litter has two cubs.^[66] The family remains in the den until mid-February to mid-April, with the mother maintaining her fast while nursing her cubs on a fat-rich milk.^[66] By the time the mother breaks open the entrance to the den, her cubs weigh about 10 to 15 kilograms (22 to 33 lb).^[66] For about 12 to 15 days, the family spends time outside the den while remaining in its vicinity, the mother grazing on vegetation while the cubs become used to walking and playing.^[66] Then they begin the long walk from the denning area to the sea ice, where the mother can once again catch seals.^[66] Depending on the timing of ice-floe breakup in the fall, she may have fasted for up to eight months.^[66]

Cubs may fall prey to wolves or to starvation. Female polar bears are noted for both their affection towards their offspring, and their valiance in protecting them. One case of adoption of a wild cub has been confirmed by genetic testing.^[67] Adult male bears males occasionally kill and eat polar bear cubs,^[71] for reasons that are unclear.^[72] In Alaska, 42% of cubs now reach 12 months of age, down from 65% 15 years ago.^[73] In most areas, cubs are weaned at two and a half years of age,^[66] when the mother chases them away or abandons them. The western coast of Hudson Bay is unusual in that its female polar bears sometimes wean their cubs at only one and a half years.^[66] This was the case for 40% of cubs there in the early 1980s; however by the 1990s, fewer than 20% of cubs were weaned this young.^[74] After the mother leaves, sibling cubs sometimes travel and share food together for weeks or months.^[53]

A female emerging from her maternity den

Later life

Females begin to breed at the age of four years in most areas, and five years in the Beaufort Sea area.^[66] Males usually reach sexual maturity at six years, however as competition for females is fierce, many do not breed until the age of eight or ten.^[66] A study in Hudson Bay indicated that both the reproductive success and the maternal weight of females peaked in their mid-teens.^[75]

Polar bears appear to be less affected by infectious diseases and parasites than most terrestrial mammals.^[72] Polar bears are especially susceptible to Trichinella, a parasitic roundworm they contract through cannibalism,^[76] although infections are usually not fatal.^[72] Only one case of a polar bear with rabies has been documented, even though polar bears frequently interact with Arctic foxes, which often carry rabies.^[72] Bacterial Leptospirosis and Morbillivirus have been recorded. Polar bears sometimes have problems with various skin diseases which may be caused by mites or other parasites.

Polar bears rarely live beyond 25 years.^[77] The oldest wild bears on record died at the age of 32, whereas the oldest captive was a female who died in 1991 at the age of 43.^[78] The oldest living polar bear is Debby of the Assiniboine Park Zoo, who was probably born in December, 1966.^[78] The causes of death in wild adult polar bears are poorly understood, as carcasses are rarely found in the species's frigid habitat.^[72] In the wild, old polar bears eventually become too weak to catch food, and gradually starve to death. Polar bears injured in fights or accidents may either die from their injuries or become unable to hunt effectively, leading to starvation.^[72]

Ecological role

A female nursing a two-year-old cub

The polar bear is the apex predator within its range. Several animal species, particularly Arctic Foxes and Glaucous Gulls, routinely scavenge polar bear kills.^[47]

The relationship between ringed seals and polar bears is so close that the abundance of ringed seals in some areas appears to regulate the density of polar bears, while polar bear predation in turn, regulates density and reproductive success of ringed seals.^[50] The evolutionary pressure of polar bear predation on seals probably accounts for some significant differences between Arctic and Antarctic seals. Compared to the Antarctic, where there is no major surface predator, Arctic seals use more breathing holes per individual, appear more restless when hauled out on the ice, and rarely defecate on the ice.^[47] The baby fur of most Arctic seal species is white, presumably to provide camouflage from predators, whereas Antarctic seals all have dark fur at birth.^[47]

Polar bears rarely enter conflict with other predators, though recent brown bear encroachments into polar bear territories have led to antagonistic encounters. Brown bears tend to dominate polar bears in disputes over carcasses,^[79] and dead polar bear cubs have been found in brown bear dens.^[80] Wolves are rarely encountered by polar bears, though there are two records of wolf packs killing polar bear cubs.^[81] Polar bears are sometimes the host of arctic mites such as Alaskozetes antarcticus.^[47]

Hunting

Indigenous people

Skins of hunted polar bears in Ittoqqortoormiit, Greenland

Polar bears have long provided important raw materials for Arctic peoples, including the Inuit, Yupik, Chukchi, Nenets, Russian Pomors and others. Hunters commonly used teams of dogs to distract the bear, allowing the hunter to spear the bear or shoot it with arrows at closer range.^[82] Almost all parts of captured animals had a use.^[83] The fur was used in particular to sew trousers and, by the Nenets, to make galoshes-like outer footwear called tobok; the meat is edible, despite some risk of trichinosis; the fat was used in food and as a fuel for lighting homes, alongside seal and whale blubber; sinews were used as thread for sewing clothes; the gallbladder and sometimes heart were dried and powdered for medicinal purposes; the large canine teeth were highly valued as talismans.^[84] Only the liver was not used, as its high concentration of vitamin A is poisonous.^[85] Hunters make sure to either toss the liver into the sea or bury it in order to spare their dogs from potential poisoning.^[84] Traditional subsistence hunting was on a small enough scale to not significantly affect polar bear populations, mostly because of the sparseness of the human population in polar bear habitat.^[86]

History of commercial harvest

In Russia, polar bear furs were already being commercially traded in the 14th century, though it was of low value compared to Arctic Fox or even reindeer fur.^[84] The growth of the human population in the Eurasian Arctic in the 16th and 17th century, together with the advent of firearms and increasing trade, dramatically increased the harvest of polar bears.^[40][87] However, since polar bear fur has always played a marginal commercial role, data on the historical harvest is fragmentary. It is known, for example, that already in the winter of 1784/1785 Russian Pomors on Spitsbergen harvested 150 polar bears in Magdalenefjorden.^[84] In the early 20th century, Norwegian hunters were harvesting 300 bears a year at the same location. Estimates of total historical harvest suggest that from the beginning of the 18th century, roughly 400-500 animals were being harvested annually in northern Eurasia, reaching a peak of 1,300 to 1,500 animals in the early 20th century, and falling off as the numbers began dwindling.^[84]

In the first half of the 20th century, mechanized and overpoweringly efficient methods of hunting and trapping came into use in North America as well.^[88] Polar bears were chased from snowmobiles, icebreakers, and airplanes, the latter practice described in a 1965 New York Times editorial as being "about as sporting as machine gunning a cow."^[88] The numbers taken grew rapidly in the 1960s, peaking around 1968 with a global total of 1,250 bears that year.^[89]

Contemporary regulations

Concerns over the future survival of the species led to the development of national regulations on polar bear hunting, beginning in the mid-1950s.^[90] In 1973, the International Agreement on the Conservation of Polar Bears was signed by all five nations whose territory is inhabited by polar bears Canada, Denmark (Greenland), Norway (Svalbard), the USSR (now the Russian Federation) and the USA (Alaska).

A Norwegian road sign used on Svalbard to warn about the presence of polar bears.

Also known as the Oslo Agreement, it was a rare case of international cooperation during the Cold War. Biologist Ian Stirling commented, "For many years, the conservation of polar bears was the only subject in the entire Arctic that nations from both sides of the Iron Curtain could agree upon sufficiently to sign an agreement. Such was the intensity of human fascination with this magnificent predator, the only marine bear."^[91]

Although the agreement is not enforceable in itself, member countries agreed to place restrictions on recreational and commercial hunting, ban hunting from aircraft and icebreakers, and conduct further research.^[92] The treaty allows hunting "by local people using traditional methods," although this has been liberally interpreted by member nations. Norway is the only country of the five in which all harvest of polar bears is banned.

Agreements have been made between countries to co-manage their shared polar bear subpopulations. After several years of negotiations, Russia and the U.S. signed an agreement in October 2000 to jointly set quotas for indigenous subsistence hunting in Alaska and Chukotka.^[93] The treaty was ratified in October 2007.^[94]

Russia

The Soviet Union banned all harvest of polar bears in 1956, however poaching continued and is believed to pose a serious threat to the polar bear population.^[23] In recent years, polar bears have approached coastal villages in Chukotka more frequently due to the shrinking of the sea ice, endangering humans and raising concerns that illegal hunting would become even more prevalent.^[95] In 2007, the Russian government made subsistence hunting legal for Chukotka natives only, a move supported by Russia’s most prominent bear researchers and the World Wide Fund for Nature as a means to curb poaching.^[95]

Greenland

In Greenland, restrictions for the species were first introduced in 1994 and expanded by executive order in 2005.^[23] Until 2005, Greenland placed no limit on hunting by indigenous people. It imposed a limit of 150 for 2006. It also allowed recreational hunting for the first time.^[96] Other provisions included year-round protection of cubs and mothers, restrictions on weapons used, and various administrative requirements to catalogue kills.^[23]

Canada and the United States

Dogsleds are used for recreational hunting of polar bears in Canada. Use of motorized vehicles is forbidden.

About 500 bears are killed per year by humans across Canada,^[97] a rate believed by scientists to be unsustainable for some areas, notably Baffin Bay.^[22] Canada has allowed sport hunters accompanied by local guides and dog-sled teams since 1970,^[98] but the practice was not common until the 1980s.^[99] The guiding of sport hunters provides meaningful employment and an important source of income for native communities in which economic opportunities are few.^[25] Sport hunting can bring CDN$20,000 to $35,000 per bear into northern communities, which until recently has been mostly from American hunters.^[100]

On 15 May 2008, the U.S. listed the polar bear as a threatened species under the Endangered Species Act and banned all importing of polar bear trophies. Importing products made from polar bears had been prohibited from 1972 to 1994 under the Marine Mammal Protection Act, and restricted between 1994 and 2008. Under those restrictions, permits from the United States Fish and Wildlife Service were required to import sport-hunted polar bear trophies taken in hunting expeditions in Canada. The permit process required that the bear be taken from an area with quotas based on sound management principles.^[101] Since 1994, more than 800 sport-hunted polar bear trophies have been imported into the U.S.^[102]

Ironically, because of the way polar bear hunting quotas are managed in Canada, attempts to discourage sport hunting would actually increase the number of bears killed in the short term.^[25] Canada allocates a certain number of permits each year to sport and subsistence hunting, and those that are not used for sport hunting are re-allocated to Native subsistence hunting. Whereas Native communities kill all the polar bears they are permitted to take each year, only half of sport hunters with permits actually manage to kill a polar bear. If a sport hunter does not kill a polar bear before his or her permit expires, the permit cannot be transferred to another hunter.^[25]

The territory of Nunavut accounts for 80% of Canadian kills.^[97] In 2005, the government of Nunavut increased the quota from 400 to 518 bears,^[103] despite protests from some scientific groups.^[104] In two areas where harvest levels have been increased based on increased sightings, science-based studies have indicated declining populations, and a third area is considered data-deficient.^[105] While most of that quota is hunted by the indigenous Inuit people, a growing share is sold to recreational hunters. (0.8% in the 1970s, 7.1% in the 1980s, and 14.6% in the 1990s)^[99] Nunavut polar bear biologist, Mitchell Taylor, who was formerly responsible for polar bear conservation in the territory, insists that bear numbers are being sustained under current hunting limits.^[106] The Government of the Northwest Territories maintain their own quota of 72–103 bears within the Inuvialuit communities of which some are set aside for sports hunters.

Conservation status, efforts and controversies

This map from the U.S. Geological Survey shows projected changes in polar bear habitat from 2001–2010 to 2041–2050. Red areas indicate loss of optimal polar bear habitat; blue areas indicate gain.

As of 2008, the World Conservation Union (IUCN) reports that the global population of polar bears is 20,000 to 25,000, and is declining.^[1] In 2006, the IUCN upgraded the polar bear from a species of least concern to a vulnerable species.^[107] It cited a "suspected population reduction of >30% within three generations (45 years)", due primarily to global warming.^[7] Other risks to the polar bear include pollution in the form of toxic contaminants, conflicts with shipping, stresses from recreational polar-bear watching, and oil and gas exploration and development.^[7] The IUCN also cited a "potential risk of over-harvest" through legal and illegal hunting.^[7]

According to the World Wildlife Fund, the polar bear is important as an indicator of arctic ecosystem health. Polar bears are studied to gain understanding of what is happening throughout the Arctic, as at risk polar bears are often a sign of something wrong with the arctic marine ecosystem.^[108]

Global warming

The IUCN, Arctic Climate Impact Assessment, United States Geological Survey and many leading polar bear biologists have expressed grave concerns about the impact of global warming, including the belief that the current warming trend imperils the survival of the species.^{[21][109][110][111][112][113]}

The key danger posed by global warming is malnutrition or starvation due to habitat loss. Polar bears hunt seals from a platform of sea ice. Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.^[74] Reduction in sea-ice cover also forces bears to swim longer distances, which further depletes their energy stores and occasionally leads to drowning.^[114] Thinner sea ice tends to deform more easily, which appears to make it more difficult for polar bears to access seals.^[50] Insufficient nourishment leads to lower reproductive rates in adult females and lower survival rates in cubs and juvenile bears, in addition to poorer body condition in bears of all ages.^[21]

In addition to creating nutritional stress, a warming climate is expected to affect various other aspects of polar bear life: Changes in sea ice affect the ability of pregnant females to build suitable maternity dens. As the distance increases between the pack ice and the coast, females must swim longer distances to reach favored denning areas on land.^[21] Thawing of permafrost would affect the bears who traditionally den underground, and warm winters could result in den roofs collapsing or having reduced insulative value.^[21] For the polar bears that currently den on multi-year ice, increased ice mobility may result in longer distances for mothers and young cubs to walk when they return to seal-hunting areas in the spring.^[21] Disease-causing bacteria and parasites would flourish more readily in a warmer climate.^[50]

A polar bear in Spitsbergen.

Problematic interactions between polar bears and humans, such as foraging by bears in garbage dumps, have historically been more prevalent in years when ice-floe breakup occurred early and local polar bears were relatively thin.^[109] Increased human-bear interactions, including fatal attacks on humans, are likely to increase as the sea ice shrinks and hungry bears try to find food on land.^[109][115] Hungry polar bears have been spotted in Halifax and Ontario, Canada, foraging for food in people's garbage cans.

Observations linked to global warming

The effects of global warming are most profound in the southern part of the polar bear's range, and this is indeed where significant degradation of local populations has been observed.^[113] The Western Hudson Bay subpopulation, in a southern part of the range, also happens to be one of the best-studied polar bear subpopulations. This subpopulation feeds heavily on ringed seals in late spring, when newly weaned and easily hunted seal pups are abundant.^[105] The late spring hunting season ends for polar bears when the ice begins to melt and break up, and they fast or eat little during the summer until the sea freezes again.^[105]

Due to warming air temperatures, ice-floe breakup in western Hudson Bay is currently occurring three weeks earlier than it did 30 years ago, reducing the duration of the polar bear feeding season.^[105] The body condition of polar bears has declined during this period; the average weight of lone (and likely pregnant) female polar bears was approximately 290 kg (640 lb) in 1980 and 230 kg (510 lb) in 2004.^[105] Between 1987 and 2004, the Western Hudson Bay population declined by 22%.^[116]

Mothers and cubs have high nutritional requirements, which are not met if the seal-hunting season is too short.

In Alaska, the effects of sea ice shrinkage have contributed to higher mortality rates in polar bear cubs, and have led to changes in the denning locations of pregnant females.^[73][117] Recently, polar bears in the Arctic have undertaken longer than usual swims to find prey, resulting in four recorded drownings in the unusually large ice pack regression of 2005.^[114]

Pollution

Polar bears accumulate high levels of persistent organic pollutants such as polychlorinated biphenyl (PCBs) and chlorinated pesticides. Due to their position at the top of the food pyramid, with a diet heavy in blubber in which halocarbons concentrate, their bodies are among the most contaminated of Arctic mammals.^[118] Halocarbons are known to be toxic to other animals because they mimic hormone chemistry, and biomarkers such as immunoglobulin G and retinol suggest similar effects on polar bears. PCBs have received the most study, and they have been associated with birth defects and immune system deficiency.^[119]

The most notorious of these chemicals, such as PCBs and DDT, have been internationally banned. Their concentrations in polar bear tissues continued to rise for decades after the ban as these chemicals spread through the food chain, however the trend seems to have abated, with tissue concentrations of PCBs declining between studies performed in 1989 - 1993 and studies performed in 1996 - 2002.^[120]

Sometimes excess heavy metals have also been observed in the polar bear.

Oil and gas development

Oil and gas development in polar bear habitat can affect the bears in a variety of ways. An oil spill in the Arctic would most likely concentrate in the areas where polar bears and their prey are also concentrated, such as sea ice leads.^[7] Because polar bears rely partly on their fur for insulation and soiling of the fur by oil reduces its insulative value, oil spills put bears at risk of dying from hypothermia.^[54] Polar bears exposed to oil spill conditions have been observed to lick the oil from their fur, leading to fatal kidney failure.^[54] Maternity dens, used by pregnant females and by females with infants, can also be disturbed by nearby oil exploration and development. Disturbance of these sensitive sites may trigger the mother to abandon her den prematurely, or abandon her litter altogether.^[7]

German stamp depicting Knut and the slogan "Preserve nature worldwide"

Predictions

The U.S. Geological Survey predicts two-thirds of the world's polar bears will disappear by 2050, based on moderate projections for the shrinking of summer sea ice caused by global warming.^[50] The bears would disappear from Europe, Asia, and Alaska, and be depleted from the Arctic archipelago of Canada and areas off the northern Greenland coast. By 2080, they would disappear from Greenland entirely and from the northern Canadian coast, leaving only dwindling numbers in the interior Arctic archipelago.^[50]

Predictions vary on the extent to which polar bears could adapt to climate change by switching to terrestrial food sources. Mitchell Taylor, who was director of Wildlife Research for the Government of Nunavut, wrote to the US Fish and Wildlife Service arguing that local studies are insufficient evidence for global protection at this time. The letter stated, "At present, the polar bear is one of the best managed of the large Arctic mammals. If all Arctic nations continue to abide by the terms and intent of the Polar Bear Agreement, the future of polar bears is secure.... Clearly polar bears can adapt to climate change. They have evolved and perisisted for thousands of years in a period characterized by fluctuating climate."^[106] Ken Taylor, deputy commissioner for the Alaska Department of Fish and Game, has said, "I wouldn't be surprised if polar bears learned to feed on spawning salmon like grizzly bears."^[25]

However, many scientists consider these theories to be naive;^[25] it is noted that black and brown bears at high latitudes are smaller than elsewhere, because of the scarcity of terrestrial food resources.^[105] An additional risk to the species is that if individuals spend more time on land, they will hybridize with brown or grizzly bears.^[113] The IUCN wrote:

“

Polar bears exhibit low reproductive rates with long generational spans. These factors make facultative adaptation by polar bears to significantly reduced ice coverage scenarios unlikely. Polar bears did adapt to warmer climate periods of the past. Due to their long generation time and the current greater speed of global warming, it seems unlikely that polar bear will be able to adapt to the current warming trend in the Arctic. If climatic trends continue polar bears may become extirpated from most of their range within 100 years.[7]

”

Controversy over species protection

Warnings about the future of the polar bear are often contrasted with the fact that worldwide population estimates have increased over the past 50 years and are relatively stable today.^[121][122] Some estimates of the global population are around 5,000–10,000 in the early 1970s;^[123] other estimates were 20,000–40,000 during the 1980s.^[28][40] Current estimates put the global population at between 20,000 and 25,000.^[23]

There are several reasons for the apparent discordance between past and projected population trends: Estimates from the 1950s and 1960s were based on stories from explorers and hunters rather than on scientific surveys.^[124][125] Second, controls of harvesting were introduced that allowed this previously overhunted species to recover.^[124] Third, the recent effects of global warming have affected sea ice abundance in different areas to varying degrees.^[124]

Debate over the listing of the polar bear under endangered species legislation has put conservation groups and Canada's Inuit at opposing positions;^[25] The Nunavut government and many northern residents have condemned the U.S. initiative to list the polar bear under the Endangered Species Act.^[126][127] Many Inuit believe the polar bear population is increasing, and restrictions on sport-hunting are likely to lead to a loss of income to their communities.^[25][128]

U.S. endangered species legislation

On 14 May 2008 the U.S. Department of the Interior listed the polar bear as a threatened species under the Endangered Species Act, citing the melting of Arctic sea ice as the primary threat to the polar bear.^[129] However, the department immediately issued a statement that the listing could not be used to regulate greenhouse gas emissions, saying, "That would be a wholly inappropriate use of the Endangered Species Act. ESA is not the right tool to set U. S. climate policy."^[130] However, some policy analysts believe that despite the government's stance, the Endangered Species Act can be used to restrict the issuing of federal permits for projects that would threaten the polar bear by increasing greenhouse gas emissions.^[129] Environmental groups have pledged to go to court to have the Endangered Species Act interpreted in such a way.^[129] On 8 May 2009, the new administration of Barack Obama announced that it would continue the policy.^[131]

While listing the polar bear as a threatened species, the Interior Department added a seldom-used stipulation to allow oil and gas exploration and development to proceed in areas inhabited by polar bears, provided companies continue to comply with the existing restrictions of the Marine Mammal Protection Act.^[132] The main new protection for polar bears under the terms of the listing is that hunters will no longer be able to import trophies from the hunting of polar bears in Canada.^[132]

The polar bear is only the third species, after the elkhorn coral and the staghorn coral protected under the Endangered Species Act due to global warming. In 4 August 2008, the state of Alaska sued U.S. Interior Secretary Dirk Kempthorne, seeking to reverse the listing of the polar bear as a threatened species, out of concern that the listing would adversely affect oil and gas development in the state.^[133] Alaska Governor Sarah Palin said that the listing was not based on the best scientific and commercial data available, a view rejected by polar bear experts.^[133]

The ruling followed several years of controversy. On 17 February 2005 the Center for Biological Diversity filed a petition asking that the polar bear be listed under the Endangered Species Act. An agreement was reached and filed in Federal district court on 5 June 2006. Pursuant to that agreement, on 9 January 2007, the US Fish and Wildlife Service proposed to list the polar bear as a threatened species. A final decision was required by law by 9 January 2008, at which time the agency said it needed another month.^[134]

On 7 March 2008, the inspector general of the U.S. Interior Department began a preliminary investigation into why the decision had been delayed for nearly two months.^[134] The investigation is in response to a letter signed by six environmental groups that U.S. Fish and Wildlife Director Dale Hall violated the agency's scientific code of conduct by delaying the decision unnecessarily, allowing the government to proceed with an auction for oil and gas leases in the Alaska's Chukchi Sea, an area of key habitat for polar bears.^[134] The auction took place in early February 2008.^[134] An editorial in The New York Times said that "these two moves are almost certainly, and cynically, related."^[25][135] Hall denied any political interference in the decision and said that the delay was needed to make sure the decision was in a form easily understood.^[134] On 28 April 2008, a Federal court ruled that a decision on the listing must be made by 15 May 2008;^[136] the decision came on 14 May.^[132]

Canadian endangered species legislation

In Canada, the Committee on the Status of Endangered Wildlife in Canada recommended in April 2008 that the polar bear be assessed as a species of special concern under the federal Species at Risk Act (SARA). A listing would mandate that a management plan be written within five years, a timeline criticized by the World Wide Fund for Nature as being too long to prevent significant habitat loss from climate change.^[137]

In culture

This engraving, made by Chukchi carvers in the 1940s on a walrus tusk, depicts polar bears hunting walrus.

Indigenous folklore

For the indigenous peoples of the Arctic, polar bears have long played an important cultural and material role.^[83][84] Polar bear remains have been found at hunting sites dating to 2,500 to 3,000 years ago^[86] and 1,500 year old cave paintings of polar bears have been found in Chukotka.^[84] Indeed, it has been suggested that Arctic peoples' skills in seal hunting and igloo construction has been in part acquired from the polar bears themselves.^[84]

The Inuit and Eskimos have many folk tales featuring the bears including legends in which bears are humans when inside their own houses and put on bear hides when going outside, and stories of how the constellation which is said to resemble a great bear surrounded by dogs came into being.^[82] These legends reveal a deep respect for the polar bear, which is portrayed as both spiritually powerful and closely akin to humans.^[82] The human-like posture of bears when standing and sitting, and the resemblance of a skinned bear carcass to the human body, have probably contributed to the belief that the spirits of humans and bears were interchangeable.^[82] Eskimo legends tell of humans learning to hunt from the polar bear. For the Inuit of Labrador, the polar bear is a form of the Great Spirit, Tuurngasuk.^[138] The Inuit and Eskimo have a great amount of respect for bears.

Among the Chukchi and Yupik of eastern Siberia, there was a longstanding shamanistic ritual of "thanksgiving" to the hunted polar bear. After killing the animal, its head and skin were removed and cleaned and brought into the home, a feast was held in the hunting camp in its honor. In order to appease the spirit of the bear, there were traditional song and drum music and the skull would be ceremonially fed and offered a pipe.^[139] Only once the spirit was appeased would the skull be separated from the skin, taken beyond the bounds of the homestead, and placed in the ground, facing north.^[84] Many of these traditions have faded somewhat in time, especially in light of the total hunting ban in the Soviet Union (and now Russia) since 1955.

The Nenets of north-central Siberia placed particular value on the talismanic power of the prominent canine teeth. They were traded in the villages of the lower Yenisei and Khatanga rivers to the forest-dwelling peoples further south, who would sew them into their hats as protection against brown bears. It was believed that the "little nephew" (the brown bear) would not dare to attack a man wearing the tooth of its powerful "big uncle" (the polar bear).^[84] The skulls of killed polar bears were buried at specific sacred sites and altars, called sedyangi, were constructed out of the skulls. Several such sites have been preserved on the Yamal Peninsula.^[84]

Symbols and mascots

Canada issued Polar Bear stamp.

Coat of arms of the Chukotka Autonomous Okrug in the Russian Federation.

Their distinctive appearance and their association with the Arctic have made polar bears popular icons, especially in those areas where they are native. The Canadian Toonie (two-dollar coin) features the image of a polar bear and both the Northwest Territories and Nunavut license plates in Canada are in the shape of a polar bear. The polar bear is the mascot of Bowdoin College in Maine and was chosen as mascot for the 1988 Winter Olympics held in Calgary.

Companies such Coca-Cola, Polar Beverages, Nelvana, Bundaberg Rum and Good Humor-Breyers have used images of the polar bear in advertising,^[140] while Fox's Glacier Mints have featured a polar bear named Peppy as the brand mascot since 1922.

Literature

Polar bears are also popular in fiction, particularly in books aimed at children or young adults. For example, The Polar Bear Son is adapted from a traditional Inuit tale.^[141] Polar bears feature prominently in East (also released as North Child) by Edith Pattou, The Bear by Raymond Briggs, and Chris d'Lacey's The Fire Within series. The panserbjørne of Philip Pullman's fantasy trilogy His Dark Materials are sapient, dignified polar bears who exhibit anthropomorphic qualities, and as such feature prominently in the 2007 film adaptation of The Golden Compass.

See also

Wikimedia Commons has more pictures of: Polar bears

• Arctic National Wildlife Refuge
• Knut (polar bear)
• USS Connecticut (SSN-22)

References

Bear

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"Ursine" redirects here. For the village, see Ursine, Nevada.

For other uses, see Bear (disambiguation).

Bears Fossil range: 38–0 Ma PreЄ Є O S D C P T J K Pg N Late Eocene - Recent
American Black Bear, Ursus americanus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Carnivora
Suborder:	Caniformia
Family:	Ursidae G. Fischer de Waldheim, 1817
Genera
Ailuropoda Helarctos Melursus Ursus Tremarctos Agriarctos † Amphicticeps † Amphicynodon † Arctodus † Indarctos † Parictis † Plionarctos † Ursavus † Kolponomos †

Bears are mammals of the family Ursidae. Bears are classified as caniforms, or doglike carnivorans, with the pinnipeds being their closest living relatives. Although there are only eight living species of bear, they are widespread, appearing in a wide variety of habitats throughout the Northern Hemisphere and partially in the Southern Hemisphere. Bears are found in the continents of North America, South America, Europe, and Asia.

Common characteristics of modern bears include a large body with stocky legs, a long snout, shaggy hair, plantigrade paws with five nonretractile claws, and a short tail. While the polar bear is mostly carnivorous and the giant panda feeds almost entirely on bamboo, the remaining six species are omnivorous, with largely varied diets including both plants and animals.

With the exceptions of courting individuals and mothers with their young, bears are typically solitary animals. They are generally diurnal, but may be active during the night (nocturnal) or twilight (crepuscular), particularly around humans. Bears are aided by an excellent sense of smell, and despite their heavy build and awkward gait, they can run quickly and are adept climbers and swimmers. In autumn some bear species forage large amounts of fermented fruits which affects their behaviour.^[1] Bears use shelters such as caves and burrows as their dens, which are occupied by most species during the winter for a long period of sleep similar to hibernation.

Bears have been hunted since prehistoric times for their meat and fur. To this day, they play a prominent role in the arts, mythology, and other cultural aspects of various human societies. In modern times, the bear's existence has been pressured through the encroachment on its habitats and the illegal trade of bears and bear parts, including the Asian bile bear market. The IUCN lists six bear species as vulnerable or endangered, and even least concern species such as the brown bear are at risk of extirpation in certain countries. The poaching and international trade of these most threatened populations is prohibited, but still ongoing.

Contents [hide] 1 Evolutionary relationships 2 Classification 3 Biology 3.1 Morphology 3.1.1 Dentition 3.2 Distribution and habitat 3.3 Behaviour 3.4 Vocalizations 3.5 Diet and interspecific interactions 3.6 Breeding 3.7 Winter dormancy 4 Relationship with humans 4.1 Bears as food and medicine 5 Culture 5.1 Names 5.2 Myth and legend 5.3 Symbolic use 5.4 Figures of speech 5.5 Teddy bears 6 See also 7 References 8 Further reading 9 External links

Evolutionary relationships

Fossil of Cave bear (Ursus spelaeus)

The Ursidae family belongs to the order Carnivora and is one of nine families in the suborder Caniformia, or "doglike" carnivorans. Bears' closest living relatives are the pinnipeds, a clade of three families: Odobenidae (the walrus), Otariidae (fur seals and sea lions), and Phocidae (true or earless seals). Bears comprise eight species in three subfamilies: Ailuropodinae (monotypic with the giant panda), Tremarctinae (monotypic with the Spectacled Bear), and Ursinae (containing six species divided into one to three genera, depending upon authority).

The origins of Ursidae can be traced back to the very small and graceful Parictis that had a skull only 7 cm (3 in) long. Parictis first occur in North America in the Late Eocene (ca. 38 million years ago), but this genus did not appear in Eurasia and Africa until the Miocene.^[2] The raccoon-sized, dog-like Cephalogale, however, is widely regarded as the most primitive ursid and is ideally suited as a representative basal taxon for the family. Cephalogale first appeared during the middle Oligocene and early Miocene (approximately 20–30 million years ago) in Europe. Cephalogale gave rise to a lineage of early bears of the genus Ursavus. This genus radiated in Asia and ultimately gave rise to the first true bears (genus Ursus) in Europe, 5 million years ago. Even among its primitive species, such as C. minor, it exhibits typical ursid synapomorphic dentition such as posteriorly oriented M2 postprotocrista molars, elongated m2 molars, and a reduction of the premolars. Living members of the ursids are morphologically well defined by their hypocarnivorous (non-strictly meat-eating) dentitions, but fossil ursids include hypercarnivorous (strictly meat-eating) taxa, although they never achieved the extreme hypercarnivory seen in mustelids. Cephalogale was a mesocarnivore (intermediate meat-eater).^[3] Other extinct bear genera include Arctodus, Agriarctos, Plionarctos and Indarctos.

It is uncertain whether ursids were in Asia during the late Eocene, although there is some suggestion that a limited immigration from Asia may have produced Parictis in North America due to the major sea level lowstand at ca. 37 Ma, but no Parictis fossils have yet to be found in East Asia. Ursids did, however, become very diversified in Asia later during the Oligocene. Four genera representing two subfamilies (Amphicynodontinae and Hemicyoninae) have been discovered in the Oligocene of Asia: Amphicticeps, Amphicynodon, Pachycynodon, and Cephalogale. Amphicticeps is endemic from Asia and the other three genera are common to both Asia and Europe. This indicates migration of ursids between Asia and Europe during the Oligocene and migration of several taxa from Asia to North America likely occurred later during the late Oligocene or early Miocene. Although Amphicticeps is morphologically closely related to Allocyon, and also to Kolponomos of North America, no single genus of the Ursidae from this time period is known to be common to both Eurasia and North America. Cephalogale, however, do appear in North America in the early Miocene. It is interesting to note that rodents, such as Haplomys and Pseudotheridomys (late Oligocene) and Plesiosminthus and Palaeocastor (early Miocene), are common to both Asia and North America and this indicates that faunal exchange did occur between Asia and North America during the late Oligocene to early Miocene. Ursid migration from Asia to North America would therefore have also been very likely to occur during this time.^[4] In the late Neogene three major carnivoran migrations that definitely included ursids are recognized between Eurasia and North America. The first (probably 21–18 Ma) was waves of intermittent dispersals including Amphicynodon, Cephalogale and Ursavus. The second migration occurred about 7–8 Ma and included Agriotherium (probably a hemicyonid – this was unusual among ursoids in that it also colonised sub-Saharan Africa). The third wave took place in the early Pliocene 4 Ma, consisting of Ursus.^[5]

The giant panda's taxonomy has long been debated. Its original classification by Armand David in 1869 was within the bear genus Ursus, but in 1870 it was reclassified by Alphonse Milne-Edwards to the raccoon family.^[6] In recent studies, the majority of DNA analyses suggest that the giant panda has a much closer relationship to other bears and should be considered a member of the family Ursidae.^[7] The status of the red panda remains uncertain, but many experts, including Wilson and Reeder, classify it as a member of the bear family. Others place it with the raccoons in Procyonidae or in its own family, the Ailuridae. Multiple similarities between the two pandas, including the presence of false thumbs, are thought to represent convergent evolution for feeding primarily on bamboo.

There is also evidence that, unlike their neighbors elsewhere, the brown bears of Alaska's ABC islands are more closely related to polar bears than they are to other brown bears in the world. Researchers Gerald Shields and Sandra Talbot of the University of Alaska Fairbanks Institute of Arctic Biology studied the DNA of several samples of the species and found that their DNA is different from that of other brown bears. The researchers discovered that their DNA was unique compared to brown bears anywhere else in the world. The discovery has shown that while all other brown bears share a brown bear as their closest relative, those of Alaska's ABC Islands differ and share their closest relation with the polar bear.^[8] There is also the very rare Tibetan Blue Bear, which is a type of brown bear. This animal has never been photographed.

Koalas are often referred to as bears due to their appearance; they are not bears, however, but marsupials.

Classification

Brown Bear Ursus arctos, at the Moscow Zoo

Asian Black Bear Ursus thibetanus, at the Wrocław Zoo, Poland

Sun Bear Helarctos malayanus, at the Columbus Zoo

Giant Panda Ailuropoda melanoleuca, "Tian Tian"

• Family Ursidae
  • Subfamily Ailuropodinae
    • Giant Panda, Ailuropoda melanoleuca
    • Dwarf Panda, Ailuropoda minor†
  • Subfamily Tremarctinae
    • Spectacled Bear, Tremarctos ornatus
    • Florida Cave Bear, Tremarctos floridanus†
    • Giant Short-faced Bear, Arctodus simus†
    • Unnamed short-faced bear species, Arctodus pristinus†
    • Brazilian Short-faced Bear, Arctotherium brasilense†
    • Argentine Short-faced Bear, Arctotherium latidens†
  • Subfamily Ursinae
    • Brown Bear, Ursus (Ursus) arctos
      • Subspecies Syrian (Brown) Bear Ursus arctos syriacus
      • Subspecies Grizzly Bear, Ursus arctos horribilis
      • Subspecies Kodiak Bear, Ursus arctos middendorffi
      • Subspecies Himalayan Brown Bear or Himalayan Red Bear, Ursus arctos isabellinus
      • Subspecies Himalayan Blue Bear, Ursus arctos pruinosus
      • Subspecies Bergman's Bear, Ursus arctos piscator†?
      • Subspecies Eurasian Brown Bear Ursus arctos arctos
      • Gobi bear, Ursus arctos gobiensis (very rare)
      • Atlas Bear, Ursus arctos crowtheri†
    • American Black Bear, Ursus (Ursus) americanus
      • Subspecies Cinnamon Bear, Ursus americanus cinnamomum
      • Subspecies Kermode Bear, Ursus americanus kermodei
    • Polar Bear, Ursus maritimus
    • Asian Black Bear, Ursus thibetanus
      • Formosan Black Bear, Ursus thibetanus formosanus
      • Ursus thibetanus gedrosianus
      • Ursus thibetanus japonicus
      • Ursus thibetanus laniger
      • Ursus thibetanus mupinensis
      • Ursus thibetanus thibetanus
      • Ursus thibetanus ussuricus
    • Sloth Bear, Melursus ursinus
      • Subspecies Sri Lankan Sloth Bear Melursus ursinus inornatus
      • Subspecies Indian Sloth Bear Melursus ursinus ursinus
    • Sun Bear, Helarctos malayanus
      • Subspecies Borneo Sun Bear Helarctos malayanus euryspilus
    • Auvergne Bear, Ursus minimus†
    • Etruscan Bear, Ursus etruscus†
    • European Cave Bear, Ursus spelaeus†
    • MacFarlane's Bear, Ursus (Vetularctos) inopinatus (cryptid; if an authentic species, extinct)
    • Deninger's bear, Ursus deningeri†

The genera Melursus and Helarctos are sometimes also included in Ursus. The Asiatic black bear and the polar bear used to be placed in their own genera, Selenarctos and Thalarctos which are now placed at subgenus rank.

A number of hybrids have been bred between American black, brown, and polar bears (see Ursid hybrids).

Biology

Morphology

Despite being quadrupeds, bears can stand and sit similarly to humans.

Unlike other carnivora, bears have plantigrade hind feet

Bears are generally bulky and robust animals with relatively short legs. Bears are sexually dimorphic with regard to size, with the males being larger. Larger species tend to show increased levels of sexual dimorphism in comparison to smaller species, and where a species varies in size across its distribution individuals from larger sized areas tend also to vary more. Bears are the most massive terrestrial members of the order Carnivora, with some Polar Bears and Brown Bears weighing over 750 kilograms (1,700 lb). As to which species is the largest may depend on whether the assessment is based on which species has the largest individuals (brown bears) or on the largest average size (polar bears). The smallest bears are the Sun Bears of Asia, which weigh an average of 65 kilograms (140 lb) for the males and 45 kilograms (99 lb) for the females.^[9]

Unlike other land carnivorans, bears are plantigrade. They distribute their weight toward the hind feet which makes then look lumbering when they walk. They are still quite fast with the brown bear reaching 30 miles per hour (48 km/h) although they are still slower than felines and canines. Bears can stand on their hind feet and sit up straight with remarkable balance. Bears have non-retractable claws which are used for digging, climbing, tearing and catching prey. Their ears are rounded.

Bears have an excellent sense of smell, a better sense of smell in fact that the dogs (Canidae), or possibly any mammal. This sense of smell is used for signalling between bears (either to warn off rivals or detect mates) and for finding food. Smell is the principal sense used by bears to find most of their diet.^[9]

Dentition

Unlike most other members of the Carnivora, bears have relatively undeveloped carnassial teeth, and their teeth are adapted for a diet that includes a significant amount of vegetable matter. The canine teeth are large, and the molar teeth flat and crushing. There is considerable variation in dental formula even within a given species. It has been suggested that this indicates bears are still in the process of evolving from a carnivorous to a predominantly herbivorous diet. Polar bears appear to have secondarily re-evolved fully functional carnassials, as their diet has switched back towards carnivory.^[10] The dental formula for living bears is:

Distribution and habitat

The bears are mostly found in the northern hemisphere, with a single species, the Andean Bear, occurring in South America. The Atlas Bear, a subspecies of the Brown Bear, was the only bear native to Africa. It was distributed in North Africa from Morocco to Libya, but has been extinct since around the 1870s. All the other species are found in North America, Asia and Europe. The most widespread species is the Brown Bear, which occurs from Western Europe eastwards through Asia to the western areas of North America. The American Black Bear is restricted to North America, and the Polar bear is restricted to the Arctic Sea. All the remaining species are Asian.^[9]

With the exception of the Polar Bear the bears are mostly forest species. Some species, particularly the Brown Bear, may inhabit or seasonally use other areas such as alpine scrub or tundra.

Behaviour

While many people think that bears are nocturnal, they are in fact generally diurnal, active for the most part during the day. The belief that they are nocturnal apparently comes from the habits of bears that live near humans which engage in some activities, such as raiding trash cans or crops, are nocturnal in order to avoid humans. The sloth bear of Asia is the most nocturnal of the bears, but this varies by individual and females with cubs are often diurnal in order to avoid competition with males and nocturnal predators.^[9] Bears are overwhelming solitary and are considered to be the most asocial of all the Carnivora. Liaisons between breeding bears are brief, and the only times bears are encountered in small groups are mothers with young or occasional seasonal bounties of rich food (such as salmon runs).^[9]

Vocalizations

Bears produce a variety of vocalizations such as:

• Moaning: produced mostly as mild warnings to potential threats or in fear.
• Barking: produced during times of alarm, excitement or to give away the animal's position.
• Huffing: made during courtship or between mother and cubs to warn of danger.
• Growling: produced as strong warnings to potential threats or in anger.
• Roaring: used much for the same reasons as growls and also to proclaim territory and for intimidation.

Diet and interspecific interactions

Asian black bear feeding on berries

Brown Bears make use of infrequent but predictable salmon runs in order to feed

Their carnivorous reputation non-withstanding, most bears have adopted a diet of more plant than animal matter and are completely opportunistic omnivores. Some bears will climb trees in order to obtain mast (edible vegatative or reproductive parts such as acorns), smaller species which are more able to climb include a greater amount of this in their diet.^[11] Such masts can be very important to the diet of these species, and mast failures may result in long range movements by bears looking for alternate sources of food.^[12] One exception is the Polar Bear, which has adopted a diet mainly of marine mammals to survive in the Arctic. The other exception is the Giant Panda which has adopted a diet mainly of bamboo. Stable isotope analysis of the extinct Giant Short-faced Bear (Arctodus simus) shows that it was also an exclusive meat eater, probably a scavenger.^[13] The Sloth Bear, though not as specialized as the previous two species, has lost several front teeth usually seen in bears and developed a long, suctioning tongue in order to feed on the ants, termites and other burrowing insects that they favour. At certain times of the year these insects can make up 90% of their diet.^[14] All bears will feed on any food source that becomes available, and the nature of that varies seasonally. A study of Asiatic Black Bears in Taiwan found that they would consume large numbers of acorns when they were most common, and switch to ungulates in other times of the year.^[15]

When taking warm-blooded animals, bears will typically take small or young animals, as they are easier to catch. Although (besides Polar Bears) both species of black bear and the Brown Bear can sometimes take large prey, such as ungulates.^[15][16] Often, bears will feed on other large animals when they encounter a carcass, whether or not the carcass is claimed by or is the kill of another predator. This competition is the main source of interspecies conflict. Bears are typically the apex predators in their range due to their size and power, and can defend a carcass against nearly all comers. Mother bears also can usually defend their cubs against other predators. The Tiger is the only known predator known to regularly prey on adult bears, including Sloth Bears, Asiatic Black Bears, Giant Pandas, Sun Bears and small Brown Bears.

Breeding

Bear cubs, like this American Black Bear, are sometimes killed by males

The age at which bears reach sexual maturity is highly variable, both between and within species. Sexual maturity is dependent on body condition, which is in turn dependent upon the food supply available to the growing individual. In the females of smaller species may have young in as little as two years, whereas the larger species may not rear young until they are four or even nine years old. First breeding may be even later in males, where competition for mates may leave younger males without access to females.^[9]

American Black Bears mating

The bear's courtship period is very brief. Bears in northern climates reproduce seasonally, usually after a period of inactivity similar to hibernation, although tropical species breed all year round. Cubs are born toothless, blind, and bald. The cubs of brown bears, usually born in litters of 1–3, will typically stay with the mother for two full seasons. They feed on their mother's milk through the duration of their relationship with their mother, although as the cubs continue to grow, nursing becomes less frequent and cubs learn to begin hunting with the mother. They will remain with the mother for approximately three years, until she enters the next cycle of estrus and drives the cubs off. Bears will reach sexual maturity in five to seven years. Male bears, especially Polar and Brown Bears, will kill and sometimes devour cubs born to another father in order to induce a female to breed again. Female bears are often successful in driving off males in protection of their cubs, despite being rather smaller.

Winter dormancy

Polar bear mother is nursing her cub

Many bears of northern regions are assumed to hibernate in the winter. While many bear species do go into a physiological state often colloquially called "hibernation" or "winter sleep", it is not true hibernation. In true hibernators, body temperatures drop to near ambient and heart rate slows drastically, but the animals periodically rouse themselves to urinate or defecate and to eat from stored food. The body temperature of bears, on the other hand, drops only a few degrees from normal and heart rate slows only slightly. They normally do not wake during this "hibernation", and therefore do not eat, drink, urinate or defecate the entire period. Higher body heat and being easily roused may be adaptations, because females give birth to their cubs during this winter sleep.

Relationship with humans

Polar bear at Wapusk National Park, Canada

See also: Bear danger

Some species, such as the polar bear, American black bear, Sloth Bear and the brown bear, are dangerous to humans, especially in areas where they have become used to people. All bears are physically powerful and are likely capable of fatally attacking a person, but they, for the most part, are shy, easily frightened and will avoid humans. Injuries caused by bears are rare, but are often widely reported.^[17] The danger that bears pose is often vastly exaggerated, in part by the human imagination. However, when a mother feels her cubs are threatened, she will behave ferociously. It is recommended to give all bears a wide berth because they are behaviorally unpredictable.

Bears may also come into conflict with humans where they raid crops or attack livestock.^[18][19] These problems may be the work of only a few bears but create a climate of conflict as farmers and ranchers may perceive all losses as due to bears and advocate the preventative removal of all bears.^[19] Mitigation methods may be used to reduce bear damage to crops, and reduce local antipathy towards bears.^[18]

Laws have been passed in many areas of the world to protect bears from hunters habitat destruction. Public perception of bears is often very positive, as people identify with bears due to their omnivorous diet, ability to stand on two legs, and symbolic importance,^[20] and there is widespread support for bear protection, at least in more affluent societies.^[21] In more rural and poorer regions attitudes may be more shaped by the dangers posed by bears and the economic costs that they incurr to farmers and ranchers.^[19] Some populated areas with bear populations have also outlawed the feeding of bears, including allowing them access to garbage or other food waste. Bears in captivity have been trained to dance, box, or ride bicycles; however, this use of the animals became controversial in the late 20th century. Bears were kept for baiting in Europe at least since the 16th century.

Bears as food and medicine

Many people enjoy hunting bears and eating them. Their meat is dark and stringy, like a tough cut of beef. In Cantonese cuisine, bear paws are considered a delicacy. The peoples of China, Japan, and Korea use bears' body parts and secretions (notably their gallbladders and bile) as part of traditional Chinese medicine. It is believed more than 12,000 bile bears are kept on farms, farmed for their bile, in China, Vietnam and South Korea.^[22] Bear meat must be cooked thoroughly as it can often be infected with trichinellosis.^[23][24][25]

Culture

Names

The English word "bear" comes from Old English bera and belongs to a family of names for the bear in Germanic languages, in origin from an adjective meaning "brown".^[26] In Scandinavia the word for bear is björn (or bjørn), and is a relatively common given name for males. The use of this name is ancient and has been found mentioned in several runestone inscriptions.^[27] In Germanic culture, the bear was a symbol of the warrior, as evident from the Old English term beorn which can take the meaning of both "bear" and "warrior".

The reconstructed Proto-Indo-European name of the bear is *h₂ŕ̥tḱos, whence Sanskrit r̥kṣa, Avestan arša, Greek ἄρκτος, Latin ursus, Welsh arth (whence perhaps the given name "Arthur"). Also compared is Hittite ḫartagga-, the name of a monster or predator.^[28] In the binomial name of the brown bear, Ursus arctos, Linné simply combined the Latin and Greek names. The female first name "Ursula", originally derived from a Christian saint's name and common in English- and German-speaking countries, means "little she-bear" (dimunitive of Latin ursa). In Switzerland the male first name "Urs" is especially popular.

In Russian and other Slavic languages, the word for bear, "Medved" (медведь), and variants or derivatives such as Medvedev are common surnames.

The Irish family name "McMahon" means "Son of Bear" in Irish.

In East European Jewish communities, the name "Ber" (בער) — Yiddish cognate of "Bear" — has been attested as a common male first name, at least since the 18th century, and was among others the name of several prominent Rabbis. The Yiddish "Ber" is still in use among Orthodox Jewish communities in Israel, the US and other countries.

With the transition from Yiddish to Hebrew under the influence of Zionism, the Hebrew word for "bear", "Dov" (דב), was taken up in contemporary Israel and is at present among the commonly used male first names in that country.

"Ten Bears" (Paruasemana) was the name of a well-known 19th Century chieftain among the Comanche. Also among other Native American tribes, bear-related names are attested.

Myth and legend

"En uheldig bjørnejakt" (An Unfortunate Bear Hunt) by Theodor Kittelsen.

Onikuma from Ehon Hyaku Monogatari

According to his hagiography, a bear killed Saint Corbinian's pack horse on the way to Rome and so the saint commanded it to carry his load. Once he arrived in Rome, however, he let the bear go.

There is evidence of prehistoric bear worship, see Arctic, Arcturus, Great Bear, Berserker, Kalevala. Anthropologists such as Joseph Campbell have regarded this as a common feature in most of the fishing and hunting-tribes. The prehistoric Finns, along with most Finno-Ugric peoples, considered the bear as the spirit of one's forefathers. This is why the bear (karhu) was a greatly respected animal, with several euphemistic names (such as otso, mesikämmen and kontio). The bear is the national animal of Finland.

This kind of attitude is reflected in the traditional Russian fairy tale "Morozko", whose arrogant protagonist Ivan tries to kill a mother bear and her cubs — and is punished and humbled by having his own head turned magically into a bear's head and being subsequently shunned by human society.

"The Brown Bear of Norway" is a Scottish fairy tale telling the adventures of a girl who married a prince magically turned into a bear, and who managed to get him back into a human form by the force of her love and after many trials and difficulties.

There has been evidence about early bear worship in China and among the Ainu culture as well (see Iomante). Korean people in their mythology identify the bear as their ancestor and symbolic animal. According to the Korean legend, a god imposed a difficult test on a she-bear, and when she passed it the god turned her into a woman and married her.

In addition, the Proto-Indo-European word for bear, *h₂ŕ̥tḱos (ancestral to the Greek arktos, Latin ursus, Welsh arth (cf. Arthur), Albanian ari, Armenian arj, Sanskrit ṛkṣa, Hittite ḫartagga) seems to have been subject to taboo deformation or replacement in some languages (as was the word for wolf, wlk^wos), resulting in the use of numerous unrelated words with meanings like "brown one" (English bruin) and "honey-eater" (Slavic medved).^[29] Thus some Indo-European language groups do not share the same PIE root. The theory of the bear taboo is taught to almost all beginning students of Indo-European and historical linguistics; the putative original PIE word for bear is itself descriptive, because a cognate word in Sanskrit is rakṣas, meaning "harm, injury".^[30]

The saddled "bear of St. Corbinian" the emblem of Freising, here incorporated in the arms of Pope Benedict XVI

Legends of saints taming bears are common in the Alpine zone. In the arms of the bishopric of Freising (see illustration) the bear is the dangerous totem animal tamed by St. Corbinian and made to carry his civilised baggage over the mountains. A bear also features prominently in the legend of St. Romedius, who is also said to have tamed one of these animals and had the same bear carry him from his hermitage in the mountains to the city of Trento.

Coat of Arms of the Abbey of Saint Gall

Similar stories are told of Saint Gall and Saint Columbanus.

This recurrent motif was used by the Church as a symbol of the victory of Christianity over Paganism, represented by the fiery.^[31]

"The Three Bears", Arthur Rackham's illustration to English Fairy Tales, by Flora Annie Steel

Imaginary bears are a popular feature of many children's stories including Goldilocks and the Three Bears, the Berenstein Bears, and Winnie the Pooh.

The constellations Ursa Major and Ursa Minor represent bears.

Symbolic use

For more details on this topic, see Bears in heraldry.

The British Lion, the Persian Cat and the Russian Bear (see The Great Game)

The Russian bear is a common National personification for Russia (as well as the Soviet Union) and even Germany. The brown bear is Finland's national animal.

The flag of California

In the United States, the black bear is the state animal of Louisiana, New Mexico, and West Virginia; the grizzly bear is the state animal of both Montana and California.

Bears appear in the canting arms of Berne and Berlin.

Also, "bear", "bruin", or specific types of bears are popular nicknames or mascots, e.g. for sports teams (Chicago Bears, California Golden Bears, Boston Bruins); and a bear cub called Misha was mascot of the 1980 Summer Olympics in Moscow, USSR.

Smokey Bear

Smokey Bear has become a part of American culture since his introduction in 1944. Known to almost all Americans, he and his message, "Only You Can Prevent Forest Fires" (updated in 2001 to "Only You Can Prevent Wildfires") has been a symbol of preserving woodlands.^[32] Smokey wears a hat similar to one worn by many U.S. state police officers, giving rise to the CB slang "bear" or "Smokey" for the highway patrol.

Figures of speech

The physical attributes and behaviours of bears are commonly used in figures of speech in English.

• In the stock market, a bear market is a period of declining prices. Pessimistic forecasting or negative activity is said to be bearish (due to the stereotypical posture of bears looking downwards), and one who expresses bearish sentiment is a bear. Its opposite is a bull market, and bullish sentiment from bulls.
• In gay slang, the term "bear" refers to male individuals who possess physical attributes much like a bear, such as a heavy build, abundant body hair, and commonly facial hair.
• A bear hug is typically a tight hug that involves wrapping one's arms around another person, often leaving that person's arms immobile. It was used in the Ronald Reagan political ad "Bear in the woods."
• Bear tracking - in the old Western states of the U.S. and to this day in the former Dakota Territory, the expression, "You ain't just a bear trackin'.", is used to mean "You ain't lying" or "That's for sure" or "You're not just blowing smoke". This expression evolved as an outgrowth of the experience pioneer hunters and mountainmen had when tracking bear. Bears often lay down false tracks and are notorious for doubling back on anything tracking them. If you are not following bear tracks, you are not following false trails or leads in your thoughts, words or deeds.
• In Korean culture a person is referred to as being "like a bear" when they are stubborn or not sensitive to what is happening around their surroundings. Used as a phrase to call a person "stubborn bear."
• The Bible compares King David's "bitter warriors", who fight with such fury that they could overcome many times their number of opponents, with "a bear robbed of her whelps in the field" (2 Samuel 17:8 [3]). The term "a bereaved bear" (דב שכול), derived from this Biblical source, is still used in the literary Hebrew of contemporary Israel.

Teddy bears