They are big, powerful, white bears. Adult males normally weigh 351 to 546 kilograms (775 to 1200 pounds). Adult females are much smaller, about 150 to 295 kilograms (330 to 650 pounds)
The largest polar bear ever recorded was a male weighing 2209 pounds. That’s big
Polar bears are perfectly adapted for life on the sea ice. They hunt their main prey there: seals . Polar bears especially like to eat seal blubber. That’s because it has a high fat content. They sometimes eat other foods like walruses or beached whales; but seals are their most important food source.
Polar bears don’t hibernate. Most of them remain on the sea ice all winter long to hunt seals.
Pregnant female bears dig snow dens in the fall to give birth-but this is not a true hibernation. They remain in the dens for four to eight months. During that that time, they don’t eat or drink and must live off their fat reserves.
Polar bears mothers usually give birth to twins. Polar bear cubs weigh just over one pound at birth! They are about thy size of butter. They have fine, soft fur.
Polar bear cubs remain with their mother in the den until they are three or four months old, drinking her rich milk. The cobs cubs snuggle close to mom to stay warm. When the cubs are big enough, the family leaves the den so the mother can return to the sea ice to hunt seals .She is very hungry at that point. Polar bears are at risk in a warming world. They need sea ice to hunt seals, and the sea ice is melting. This is caused by global warming from greenhouse gases.