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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).
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.
Karl von Frisch (1953) discovered that honey bee workers can navigate, and indicate the range and direction to food to other workers with a waggle dance.. In 1873, Charles Darwin wrote a letter to Nature magazine, arguing that animals including man have the ability to navigate by dead reckoning, even if a magnetic 'compass' sense and the ability to navigate by the stars is present: [2]
As climate change diminishes sea ice from coastal communities in the Arctic and the subarctic, researchers expect polar bears to range farther into the towns
They can smell carcasses that are often left by polar bears anywhere from 10 to 40 km (6.2 to 24.9 mi). It is possible that they use their sense of smell to also track down polar bears. Additionally, Arctic foxes can smell and find frozen lemmings under 46–77 cm (18–30 in) of snow, and can detect a subnivean seal lair under 150 cm (59 in ...
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 ...
Taylor has published over 5150 scientific papers on polar-bear-related topics, and he has worked in the field on most of the world's polar bear populations. He was a coauthor of the 2008 Committee on the Status of Endangered Wildlife in Canada (COSEWIC) Assessment and Update Status Report for polar bears. From 2004 to 2008, he was also manager ...
The polar bear (Ursus maritimus) creates a maternity den either in an earthen subterranean or in a snow cave.On the Hudson Bay Plain in Manitoba, Canada, many of these subterranean dens are situated in the Wapusk National Park, from which bears migrate to the Hudson Bay when the ice pack forms. [2]