Animals of the world, Polar bear

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  • Polar bears are the only bear species to be considered marine mammals because of their dependence on the sea ice. Their native range lies largely within the Arctic circle
  • Polar bears are stocky, with a long neck, relatively small head, short, rounded ears, and a short tail.
  • They have a thick layer of body fat and a water-repellant coat that insulates them from the cold air and water.
  • 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. The white coat usually yellows with age
  • Male polar bears weigh around 350–700 kg (772–1,543 lbs), and are twice the size of females
  • The broad feet have hairy soles to protect and insulate as well as to facilitate movement across the ice
  • Polar Bears have no natural predators, though walruses and wolves can kill them.
  • Polar bears can swim for long distances to get from one piece of ice to another. In swimming the polar bear uses only its front limbs, an aquatic adaption found in no other four-legged mammal
  • Their diet mainly consists of ringed and bearded seals
  • Polar bears hunt their preferred food of seals from the edge of sea ice, often living off fat reserves when no sea ice is present
  • Longevity in the wild is 25 to 30 years

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