Polar bears are wonderfully insulated; to the point where they overheat at temperatures above 50°F (10°C). Their insulation is so effective that when viewed with infrared (heat) camera they are barely visible. Only the pads of their feet emit detectable heat. It is the most completely carnivorous member of the bear family and feeds mainly on seals. Polar bears are excellent swimmers and can often be seen in open waters miles from land. This may be a sign that they have begun aquatic adaptations to better catch their prey. They also hunt very efficiently on land due to their prodigious speed; they are more than capable of outrunning a man. As a pure carnivore predating upon fish-eating carnivores, the polar bear ingests large amounts of Vitamin A, which is stored in its liver: in the past, humans have been poisoned by eating liver of polar bears.














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Images 1 Through 6 From The U.S. Fish & Wildlife Service
Images 7 Through 18 Are From The N.O.A.A.
























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