Which of the animal sleeps right through cold winter months?

Hibernating Animals sleep through cold winter months. Hibernation is a state of deep sleep that animals enter to conserve energy during the winter months when food is scarce and the weather is cold. During hibernation, an animal's body temperature drops, its heart rate and breathing slow down, and its metabolism decreases. Some animals that hibernate include bears, bats, groundhogs, and chipmunks.