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Line 1: − '''Hibernation''' is a behaviour of certain animals, particularly in cold climates, of entering [[dormancy]] (a prolonged physically inactive state of lowered [[metabolism|metabolic]] activity) as a means of coping with the vicissitudes of [[winter]]. While many animals will sleep more than usual during the winter, true hibernation involves dramatically reduced heartrates and body temperatures, generally over a single unbroken period of torpor.+ − − Animals that hibernate include [[bear]]s, the [[dormouse]], the [[hedgehog]], and many types of [[reptile]]s and [[amphibian]]s. − − Most [[bird]]s [[Animal migration|migrate]] to avoid harsh seasonal conditions; the common poorwill, a type of [[nightjar]], is the only bird known to hibernate. Historically, [[swallow]]s were believed to hibernate at the bottom of ponds. − − Animals which become inactive in summer are said to [[Aestivation|aestivate]]. − − [[Category:Zoology]]
merged per User_talk:DavidE#Merging_in_your_sleep
#REDIRECT [[Dormancy]]