Tarsiers are nocturnal, meaning they’re most active at night. So daytime is sleep time for this small primate.
Photograph by LordRunar, Getty Images
Red-eyed tree frogs have special suction cup-like toes to help them stay in place while resting on leaves.
Photograph by kerkla, Getty Images
Oh, you slept like a log? That’s nothing! These brown bears sleep on a log.
Photograph by Design Pics Inc, Alamy Stock Photo
Koalas are one of the sleepiest creatures. They snooze up to 18 hours a day!
Photograph by woodstock, Getty Images
Seriously, iguana take a nap!
Photograph by Digitaler Lumpensammler, Getty Images
Momma sea otters carry their pups on their bellies. Looks like it’s nap time for this little guy!
Photograph by Donald M. Jones, Minden Pictures
Don’t forget to tuck this little guy in! An Adélie penguin chick sleeps under one of its parents for warmth.
Photograph by Joel Sartore, Getty Images
California sea lions are faster than any other sea lion or seal, reaching speeds up to 25 miles an hour. No wonder these guys need a break!
Photograph by Jak Wonderly
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