Estivation (aestivation): A state of dormancy during heat or drought periods. Characterized by low metabolic activity and formation of a protective cocoon made of skin secretions or layers of shed skin.
Hibernation: A state of cold-period dormancy in mammals. Cold-blooded animals are sometimes said to "hibernate", but the correct term is [brumation].
Brumation: A state of cold period dormancy or reduced activity in cold-blooded animals. Unlike [hibernation], the animal may remain partially active during brumation.
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