When hippos are upset, their sweat turns red.
Cows Sleeping Facts
Cows can sleep standing up, but they can only dream lying down.
More Animals Facts
When hippos are upset
Roosters Crow Fact
Roosters cannot crow if they cannot extend their necks.
Owl's Eyelid Fact
The owl is the only bird to drop its upper eyelid to wink. All other birds raise their lower eyelids.