Do Butterflies Sleep?
By: EjazUlHaqBhat
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Butterflies sleep and as day-fliers, they tend to spend the night motionless and unresponsive
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Many butterfly species rest in groups called roosts or bivouacs. They may roost for one night or the entire winter
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Roosting helps butterflies conserve energy and protects them from predators
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Butterflies enter a sleep posture, even though they can't close their eyes because they don't have eyelids
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They become quiescent, or inactive, during their sleep state. This state is often driven by the air temperature
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Butterflies use their sleep state to digest their food, produce eggs or sperm, and take advantage of a time when there's not much else to do
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Butterflies can still fly off if they're disturbed while in their sleep state
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They are most vulnerable when they're resting and not as alert, so they blend into their surroundings
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