Parrot parents "name" their children with a signature call.
112
When cats are happy, they may squeeze their eyes shut.
10
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
A group of kittens is called a "kindle".
10