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Polar Bear

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Polar Bear
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Polar Bear
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Polar Bear _Desigend by theRowmeister ( http://www.thingiverse.com/thing:288751/#files ) _Polar bear (Ursus maritimus), also called white bear, sea bear, or ice bear, great white northern bear (family Ursidae) found throughout the Arctic region. The polar bear travels long distances over vast desolate expanses, generally on drifting oceanic ice floes, searching for seals, its primary prey. Except for one subspecies of grizzly bear, the polar bear is the largest and most powerful carnivore on land. It has no natural predators and knows no fear of humans, making it an extremely dangerous animal. _Polar bears are stocky, with a long neck, relatively small head, short, rounded ears, and a short tail. The male, which is much larger than the female, weighs 410 to 720 kg (900 to 1,600 pounds). It grows to about 1.6 metres (5.3 feet) tall at the shoulder and 2.2–2.5 metres in length. The tail is 7–12 cm (3–5 inches) long. Sunlight can pass through the thick fur, its heat being absorbed by the bear’s black skin. Under the skin is a layer of insulating fat. The broad feet have hairy soles to protect and insulate as well as to facilitate movement across ice, as does the uneven skin on the soles of the feet, which helps to prevent slipping. Strong, sharp claws are also important for gaining traction, for digging through ice, and for killing prey. _Polar bears are solitary and strictly carnivorous, feeding especially on the ringed seal but also on the bearded seal and other pinnipeds. The bear stalks seals resting on the ice, ambushes them near breathing holes, and digs young seals from snow shelters where they are born. Polar bears prefer ice that is subject to periodic fracturing by wind and sea currents, because these fractures offer seals access to both air and water. As their prey is aquatic, polars bears are excellent swimmers, and they are even known to kill beluga whales. In swimming the polar bear uses only its front limbs, an aquatic adaptation found in no other four-legged mammal. Polar bears are opportunistic as well as predatory; they will consume dead fish and carcasses of stranded whales and eat garbage near human settlements. _At the turn of the 21st century, an estimated 20,000 to 25,000 polar bears existed in the wild. Because of continued global warming, a substantial reduction in the coverage of Arctic summer sea ice—prime habitat for polar bears—is expected by the middle of the 21st century. Models developed by some scientists predict an increase in polar bear starvation as a result of longer ice-free seasons and a decline in mating success, since sea-ice fragmentation could reduce encounter rates between males and females.Model forecasts by the U.S. Geological Survey suggest that habitat loss may cause polar bear populations to decline by two-thirds by the year 2050. In May 2008 the U.S. government listed the polar bear as a threatened species.
Additional Information

Additional Information

SKU 10000225
Length [mm] 120
Width [mm] 35.85
Height [mm] 59.06
Volume [cm³] 77.72
Area [cm²] 139.95
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