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Their eyes are closed at birth. A: About 775 pounds to 1,500 pounds. A: Constantine John Phipps.

Fifty long-distance swims were recorded; the longest at 354 kilometres 220 mi , with an average of 155 kilometres 96 mi. The bear was able to reach the truck and tore one of the doors off the truck before Hoshino was able to drive off. This article is about the animal. Before their final emergence from the den, the cubs leave the den for short periods of time.



Polar bears are listed under a variety of classifications depending on international, national, and regional regulations. Internationally, they are listed as a vulnerable species by the IUCN. In Russia, polar bears are classified as a Red Data Book species, a listing that includes animals considered rare or endangered. Canada considers polar bears a species of special concern under the National Species at Risk Act. On a regional level in Canada, polar bears are listed as threatened in both Manitoba and Ontario under provincial endangered species legislation. In all cases, the primary conservation concern for polar bears is habitat loss and reduced access to their seal prey due to climate change. Scientists predict that as the Arctic continues to warm, two-thirds of the world's polar bears could disappear within this century. Research also shows that hope remains if action is taken to greatly reduce greenhouse gas emissions soon. At the 2014 meeting of the PBSG, the world's leading polar bear scientists reported that of the 19 subpopulations of polar bears, three were declining, six were stable, and one was increasing. They lacked sufficient data on the status of the remaining nine. Adult males normally weigh 350 to more than 600 kilograms 775 to more than 1,300 pounds. Adult females are smaller, normally weighing 150 to 295 kilograms 330 to 650 pounds. Researchers in Canada estimated one male bear at 800 kilograms 1,700 pounds! Scientists usually refer to how tall bears are by measuring them at the shoulder when on all fours. Those heights are typically 1-1. An adult male may reach over three meters 10 feet when standing on its hind legs. They're built for it! Polar bears are designed for the Arctic climate, where winter temperatures can plunge to -45º C -50º F. Polar bears are insulated by two layers of fur that help keep them warm. When in good body condition, they also have a thick fat layer. In addition, their compact ears and small tail also prevent heat loss. In fact, polar bears have more problems with overheating than they do from the cold—especially when they run. Polar bear feet are furred and covered with small bumps called papillae to keep them from slipping on ice. Their sense of smell is powerful for detecting seals. And their powerful claws can haul out a 40-90 kg 150-200 lb seal from the water for dinner. Polar bears have evolved to feed on ice seals, specifically seal fat, the highest calorie food source possible. The bears prey on both ringed and bearded seals across their range, but will take other prey when available. Ringed seals, which are smaller, are the most accessible, especially to younger bears and females. Male polar bears also hunt bearded seals, which are much larger. When adult bears are in good shape, they eat only the blubber in order to build up the fat reserves they need to sustain themselves between meals. They leave the carcass for scavengers, such as arctic foxes, ravens, and other bears. All the other foods that polar bears may eat are less predictable. Most of these foods, with the exception of walrus or whales, don't provide enough calories to sustain the polar bear's massive body size or to build up the bear's own fat reserves. While short by our standards, polar bears are considered long-lived animals. In the wild, polar bears live an average 15 to 18 years, although biologists have tagged a few bears in their early 30s. In captivity, some long-lived bears reach their mid- to late 30s. Debby, a captive bear in Canada, lived to be 42. Polar bear cubs are born in snow caves called maternity dens. After feeding heavily in April or May, female bears that have mated dig a den in late October or early November. Most choose den sites in snowdrifts along mountain slopes or hills near the shore. Some dig their dens in snowdrifts on the sea ice. The cubs are most often born in December.

Females are comparatively smaller and weigh around 150 to 250 elements 330 to 550 pounds and measure 1. The New York Times. Polar bear cubs are born in snow caves called maternity dens. Many Inuit believe the polar bear population is increasing, and restrictions on commercial sport-hunting are likely to lead to a loss of del to their communities. Polar Bears being the largest land carnivore, stand at the top of the food chain pyramid in the Arctic. Willowdale, ON: Firefly Books Ltd. After mating, the fertilized egg remains in a suspended state until August or September. Journal of Wildlife Management. They use their big front feet to paddle and their back legs as rudders.