Results for “what is hibernation” · retrieved September 22, 2026
Hibernation is a state of significantly reduced metabolic activity, body temperature, and heart rate that helps animals conserve energy during periods of food scarcity or extreme cold.
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Physiological Changes
Hibernation is not the same as sleep; it involves drastic physiological changes, such as a slowed heart rate and breathing, and a significant drop in body temperature to conserve energy.
Purpose and Triggers
While often triggered by winter, hibernation is primarily a survival strategy for when food is unavailable. Some animals hibernate in response to other stressors, such as fires or heat.
Periodic Arousals
Hibernators do not stay in a continuous state of dormancy. They often undergo periodic arousals to warm up, which are energetically costly and may serve purposes like sleeping or immune system maintenance.
Classification Debate
Biologists debate the classification of hibernators. Some use a strict definition requiring a deep drop in body temperature, which excludes animals like bears, while others use a broader definition based on metabolic suppression.
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About this answerHibernation
Hibernation is a state of minimal activity and metabolic reduction entered by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It is most commonly used to pass through winter months – called overwintering....Although traditionally reserved for "deep" hibernators such as rodents, the term has been redefined to include animals such as bears [1]
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Hibernation: Nature's Nap Time (U.S. National Park Service)
Did your teacher ever tell you that every square is a rectangle, but not every rectangle is a square? Similarly, hibernation is a type of dormancy, but not all dormant animals hibernate. That’s because hibernation is a really specific kind of dormancy....Dormancy describes an animal that has slowed down its bodily functions for a little while, but hibernation has some very specific rules....Winter has two big problems for animals. There’s less fo
September 13, 2021
HIBERNATION | definition in the Cambridge English Dictionary
the state of being asleep for the winter:...go into hibernation Bears go into hibernation in the autumn....The main purpose of hibernation is to conserve energy while food is scarce (typically during the winter months)....From Slate Magazine
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What animals hibernate? Why? - BBC Bitesize
animals hibernate through...What is hibernation?...The cold, dark winter months can make it difficult for animals to find food and water. Hibernation helps some animals survive this time. These animals become inactive to save energy....Hibernating is not the same as sleeping....During hibernation, an animal's heart rate and breathing slows down. Their body temperature also decreases. These changes help hibernating animals survive using less en
March 9, 2021
Some Animals Don't Actually Sleep for the Winter, and ...
For people who aren't fans of winter, animals that hibernate seem to have the right idea: It's the equivalent of burying your head under the covers until spring comes—isn't it? Not quite. Read on for more behind the science of hibernation. What Is Hibernation? Despite what you may have heard, species that hibernate don’t “sleep” during the winter. Hibernation is an extended form of torpor, a state where metabolism is depressed to less than five p
September 6, 2024
How Hibernation Works | HowStuffWorks
- Hibernation is a state where animals significantly reduce their metabolic rate, body temperature, heart rate and breathing to conserve energy during periods when food is scarce.- Unlike sleep, which is primarily a mental change, hibernation involves drastic physiological changes, and waking a hibernating animal can be fatal due to the high energy cost of rewarming.- Hibernation is triggered by various factors, including temperature, food availa
May 28, 2024
Why do animals hibernate?
We all know how hard it is to get out of a warm bed on a cold winter morning. But what if you couldn’t get out of bed? What if you couldn’t even wake up… for months at a time? While dreaming the cold months away might sound like just the vacation you need, the involuntary biological process called hibernation is critical to the survival of many animals that live in and around Teatown. What is hibernation?...As winter approaches in New York, an
November 5, 2018
Hibernation: Current Biology
Hibernation (multiday torpor) and daily torpor in heterothermic mammals and birds are characterized by pronounced temporal reductions in body temperature, energy expenditure, water loss, and other physiological functions and are the most effective means for energy conservation available to endotherms. Hibernators express multiday torpor predominately throughout winter, which substantially enhances winter survival. In contrast, daily heterotherms
March 4, 2013
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