When bears go to sleep in the winter, it is called Hibernation. Squirrels, birds, and other animals who dislike the cold do the same thing.
Winter sleep is called hibernation. Hibernation is when animals (such as bears) sleep for multiple months in order to conserve energy during the winter.
Some animals sleep through the winter -- those animals are called hibernators. The long sleep through the winter is called hibernation.
Scientists have done many experiments and the result is that mostly all bears hibernate/sleep the whole winter. There are very few types of bears that do not hibernate the whole winter. The sloth bear, though, does sleep all winter.
sleep
bears sleep in caves and up in tree tops bears love to be in smaller caves summer bell
same same
bears ,some squirrels, weasels
bears sleep a lot during the winter but they do not truly hibernate . They sleep undisturbed for long hours. Thier long sleeping pattern is called denning
bears sleep through winter to conserve food, especially during winter when food is short, tapping energy reserves, body fat, at a slow rate. you can find out more at here: http://en.wikipedia.org/wiki/Hibernation
Koalas don't hibernate through Winter.
Some animals such as bears go into a state of dormancy called hibernation during the winter. They reduce their metabolic rate and conserve energy by sleeping for extended periods. Hibernation helps these animals survive the cold and scarce food resources during the winter months.
A nap. Majority of polar bears do not sleep during the winter. Heavily pregnant sows will, but only for a few months out of the entire winter, then they're up and about with their cubs hunting on the sea ice.