Giraffe were once believed to primarily rest while standing, but recent studies indicate they lie down more frequently.
When lying down, giraffe fold their legs underneath their bodies, often keeping their necks erect. They are known to continue feeding and chewing cud while in this resting posture.
Occasionally, for brief periods of typically no more than five minutes, giraffe may sleep with their heads resting on their rumps. This highly exposed and vulnerable position is rarely observed and only maintained for short intervals. Research conducted in zoos reveals that giraffe achieve REM sleep when in this posture.
