Snakes and many other reptiles find shelter in holes or burrows, and spend the winter inactive, or dormant. This is similar to hibernation. Snakes crawl into caves, hollow logs, or other animal's burrows to hibernate. Sometimes there will be as many as a hundred snakes in one cave. (A group site is called a hibernaculum). Snakes may also hibernate in any area free from frost and can be found in narrow crevices in rocks, animal burrows, holes under trees and stumps, under wood piles, and occasionally in basements.