Brrrr! It’s getting chilly in the northern part of our planet. When it’s cold out, people wear sweaters and scarves to stay warm. But what do animals do?
Some animals hibernate. Their bodies slow down to save energy. This adaptation helps them survive the harshest months of the year. “It’s a way to avoid periods when there’s very little to eat,” says Mark Brigham, a biologist at the University of Regina in Canada.
Hundreds of species hibernate—but each does it a little differently. Here are four animals that snooze through the winter in unusual ways.