Do butterflies (insects) sleep, and if so, where??
I have googled for information but didn't get an exact answer.
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It would be better to say that they go into an inactive, low metabolic state. This low metabolic state is often driven by the temperature in the air itself; ectothermic butterflies require outside heat-energy to become active. Basically they use this time to digest their food and produce sperm/eggs. (reference). At night, or during inclement weather, most butterflies perch on the underside of a leaf (this provides them with a bit of shelter from the rain and makes them less noticeable to prey), crawl deep between blades of grass or into a crevice in rocks, or find some other shelter to rest (reference). In short, I would not call it sleeping but just a state of rest. Butterflies cant even close their eyes from the lack of eyelids (reference).