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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).
Arctic ringed seals inhabit the Arctic Ocean, and are the most abundant and wide-ranging seal in the Northern Hemisphere. The ringed seal species is the smallest true seal, and gets its name from a distinctive patterning of light spots on dark grey colored fur. The ringed seal is commonly preyed upon by Polar bears, Arctic foxes, and Killer whales.
The white protective coloration of arctic animals was noted by an early student of camouflage, the naturalist Alfred Russel Wallace, in his 1889 book Darwinism; he listed the polar bear, the American polar hare, the snowy owl and the gyr falcon as remaining white all year, while the arctic fox, arctic hare, ermine and ptarmigan change their ...
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Chameleons - Colour change signals a chameleon's physiological condition and intentions to other chameleons. [3] [4] Because chameleons are ectothermic, they change color also to regulate their body temperatures, either to a darker color to absorb light and heat to raise their temperature, or to a lighter color to reflect light and heat, thereby either stabilizing or lowering their body ...
Tragic photos taken on a remote Arctic island show two young polar bear cubs playing with and chewing on a large sheet of black plastic as their mother looks away.
The polar bear population is estimated to be around 16,000 in Canada, which is more than 60% of the world’s population. The bears are said to be most active during the day and have a keen sense ...
Yet what most research has not also taken into account is the quick drop in polar bear populations. As the main predator of ringed seals, the polar bear's extinction in the coming years will allow for ringed seal populations to flourish. In the end, ringed seals are estimated to thrive with no polar bears present in the Arctic and Sub Arctic. [20]
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