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The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).
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The key danger for polar bears posed by the effects of climate change 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.
English: Map showing subpopulation of Polar Bears in the Arctic. This map was improved or created by the Wikigraphists of the Graphic Lab (en). You can propose images to clean up, improve, create or translate as well.
While hunting has long been an issue, global warming has done a number on polar bears' habitats recently. In fact, the World Wide Fund for Nature (or WWF) estimates that there are only 22,000 to ...
The range of the polar bear encircles the North Pole. A circumpolar distribution is any range of a taxon that occurs over a wide range of longitudes but only at high latitudes ; such a range therefore extends all the way around either the North Pole or the South Pole .
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Polar bear on Wrangel Island. Wrangel Island is a breeding ground for polar bears—having the highest density of dens in the world—bearded and ringed seals, walrus, as well as collared and west and east Siberian lemmings, a major food source for terrestrial carnivores, namely the Arctic foxes, wolverines and wolves which also inhabit the island.