The term for an animal that hibernates is "hibernator." Hibernation is a survival strategy adopted by various species, particularly in response to cold weather and food scarcity. During hibernation, an animal's metabolic rate significantly decreases, resulting in lower body temperature and reduced heart rate, allowing it to conserve energy. Common hibernators include bears, bats, and certain rodent species. The duration and nature of hibernation can vary widely among species. This adaptation helps these animals endure harsh conditions until favorable weather returns and resources become available again.