Sleeping animals: what’s the difference between hibernate, aestivate, dormant, lethargic, diurnal, nocturnal, and crepuscular?

Animals sleep. Some animals sleep at night, some animals sleep during the day, and some animals sleep in cold climates.

Animals that are diurnal are active mainly during the day and sleep at night.

Animals that are nocturnal are active mainly at night and sleep during the day.

Animals that are active mainly at dawn and dusk are crepuscular. They sleep during the day and during the night.

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