polar bears :: essays research papers

Polar Bear, common name for a white comport found on the sea ice of the Arctic throughout the north Polar basin. The only marine bear, it is longer than new(prenominal) bears and streamlined for aquatic life. It has the plantigrade feet (heel and sole touching the ground) typical of bears, with five sharp, curved claws on each foot for grasping the ice and holding its prey. Long tomentum cerebri between the pads protects the bears feet from the cold and provides traction on the ice. Stiff hairs on the forelegs, and rattling broad front feet, help the bear swim. All polar bears ar white, although their fur may yellow in the summer.The largest wild bears ever considered more than 800 kg (1760 lb)have been polar bears. However, most male polar bears weigh an average of about 350 kg (about 880 lb), and most females weigh about 250 kg (550 lb). Polar bears have a strong navigational sense, an extremely high-priced sense of smell, and they are unusually clever at solving problems in order to obtain food. They eat primarily ringed seals, and occasionally bearded seals, walruses, or white whales. They also feed on berries, sedges, mussels, and kelp.As with other true bears, polar-bear mothers and young form strong bonds. The young are rattling small when born about 1 kg (about 2 lb). Their eyeball remain closed for about 40 days and they must cheer every few hours. The mother holds them close to keep them warm. Except during the facts of life season, male polar bears are solitary and roam over commodious expanses of sea ice while hunting. During the breeding season (May to June), the males fight furiously over females.