Loon jumps into Polar Bear Den.
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, they spend most of their time at sea. Their scientific name means "maritime bear", and derives from this fact. Polar bears can hunt consistently only from sea ice, which is why they spend much of the year on and near the edge of 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, large scale hunting raised international concern for the future of the species; populations rebounded after controls and quotas began to take effect. 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 polar bear is the largest terrestrial carnivore, being more than twice as big as the Siberian tiger.[33] It shares this title with the Kodiak Bear.[34] Adult males weigh 350--680 kg (770--1500 lbs) and measure 2.4--3 m (7.9--9.8 ft) in length.[35] 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).[35] The polar bear is among the most sexually dimorphic of mammals, surpassed only by the pinnipeds.[36] 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.[37]
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.[21] As predicted by Allen's rule for a northerly animal, the legs are stocky and the ears and tail are small.[21] 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.[38] The pads of the paws are covered with small, soft papillae (dermal bumps) which provide traction on the ice.[21] 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.[21] 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,[39][40] there is no scientific evidence to support this claim.[41] 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.[21] The cheek teeth are smaller and more jagged than in the brown bear, and the canines are larger and sharper.
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.[64] Satiated polar bears rarely attack humans unless severely provoked, whereas hungry polar bears are extremely unpredictable and are known to kill and sometimes eat humans.[57] Polar bears are stealth hunters, and the victim is often unaware of the bear's presence until the attack is underway.[65] Whereas brown bears often maul a person and then leave, polar bear attacks are more likely to be predatory and are almost always fatal.[65] 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,[57] and polar bear zoologist Nikita Ovsianikov has described adult males as having "well-developed friendships."[64] 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.[66] Polar bears have a wide range of vocalisations, including bellows, roars, growls, chuffs and purrs.[67]
This is why people should exercise.
MrWaffleKing 11 months ago 3
These bears better not have died for this dumb bitch!
They are already going extinct!
greenrawr 9 months ago 2