- Dolphins sleep with one eye open. During their sleep, one-half of their brain is active, thus they can swim while sleeping.
- Sea otters sleep holding hands or paws to avoid separating from their clans.
- The albatross sleep while flying so that they can keep flying on water without landing.
- Brown Bats sleep upside down for approximately 19 hours a day.
- Giraffe sleep by bending its neck backwards and resting its head on the hip or thigh.
- Crocodiles often sleep with their mouths open for heat regulation.
Written by: Moonface