Owls sleep in crevices, abandoned buildings, hollow trees or perched on the high branches of their habitat. Because they are nocturnal and known to be light sleepers, they are rarely found resting in areas frequented by humans during the day.
When perched, owls tend to sleep with their body slightly slouched and facing forward. Remarkably, they may sleep with their head turned up to 270 degrees without cutting off blood supply to the brain. The bottom of three eyelids come up when they sleep; the others are used for blinking and cleaning the eyes when awake. Studies have shown that owls can sleep with one half of their brain while the other is awake. The predators usually rise at dusk and begin hunting for bugs, small rodents and other prey once night falls.