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Hibernation and Migration in animals

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Understanding the definition of Hibernation and Migration:-These two are part of animals adaptation practices. Animals in winter tend to extend their period of deep sleep,it helps them survive the winter extremes.With low body-activity,animals tend to reduce their need of food which is hard to come by in cold season.This is known as hibernation.Animals like hedgehogs and bears are famous for their hibernation.Hibernation period for bears and hedgehogs lasts for months. Whereas few other animals tend to change places in search of food and warmth,many of the birds and several animals like elephants migrate to other places for mating.This is known as migration.The arctic tern holds the record of longest distance migration among the birds.