Why don't polar bears hibernate in the winter?

A genetic adaptation that helps convert food into heat or energy may explain how polar bears survive the chill of an Arctic winter without hibernating. read more

Brown and black bears hibernate during winter to conserve energy and stay warm. But the same isn’t true for polar bears. Only pregnant polar bears den up for the colder months. read more

It is a common misconception that bears hibernate during the winter. While bears tend to slow down during the winter, they are not true hibernators. Black bears, Grizzly bears and Brown bears do go into a deep sleep during the winter months, known as torpor. read more

Females do but the males do not as they don't necessarily need the protection from the cold. Instead of shivering to produce heat when cold, their bodies convert their energy into exothermic heat which keeps them warm during the winter months when the sun is nonexistent. read more