According to University of Wisconsin biologist Barrett Klein, paper wasps, cockroaches, praying mantises, and fruit flies definitely doze. The challenge though, he tells National Geographic, is identifying when an insect is actually zonked out or just in a "sleep-like state."
If they are "drooping in the direction of gravity," they are likely snoozing.
In a 2010 study, Klein looked at sleep deprivation in honeybees, creating quite a super villainous sounding machine to do so: the insominator.
In his experiments, magnets in the insominator disturbed the sleep of bees tagged with steel, while their nestmates, tagged with copper, got plenty of rest.
Bees inform each other about food sources and potential nest sites through a movement called a "waggle dance." The study showed sleep-deprived bees "behaved quite differently than bees with the more precise directional information."
