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Updated by Paul Hugh O'Mahony on Jul 13, 2023
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10 Animals That Hibernate - Conservation Institute

Some animals hibernate (go into a deep sleep) so they can survive throughout the cold season when the weather is freezing and the food is scarce. Hibernation truly is a clever survival mechanism. Here is a list of 10 animals that hibernate.

What animals hibernate during the winter?

Animals like bears, bats and chipmunks hibernate during the winter, and humans should not disturb them.

Hibernation

Hibernation is a state of inactivity and metabolic depression in endotherms. Hibernation refers to a season of heterothermy that is characterized by low body temperature, slow breathing and heart rate, and low metabolic rate. Although traditionally reserved for "deep" hibernators such as rodents, the term has been redefined to include animals such as bears and is now applied based on active metabolic suppression rather than based on absolute body temperature decline. Many experts believe that the processes of daily torpor and hibernation form a continuum and utilize similar mechanisms.[1][2] Hibernation during the summer months is known as aestivation. Some reptile species (ectotherms) are said to brumate, or undergo brumation, but any possible similarities between brumation and hibernation are not firmly established. Some insects, such as the wasp Polistes exclamans, hibernate by aggregating together in groups in protected places called hibernacula.[3]