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Key Vocabulary

Seasonal
Estacional
Refuted
Refutado
Atrophy
Atrofia
Wasting
Desecho

Hibernation; Part II

What is hibernation? Learn more about how some animals survive cold winters.

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Hibernation; Part II

What is hibernation? Learn more about how some animals survive cold winters.

Advanced
Read and listen to this story in Beelinguapp!

Obligate hibernators enter hibernation based on seasonal timing cues rather than as a response to stressors from the environment. Unlike them, Facultative hibernators enter hibernation only when either cold-stressed, food-deprived, or both. Only mammals hibernate. However, a few birds, including hummingbirds, do something similar.

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