The reindeer is the only mammal that can see UV light.
17
A group of kittens is called a "kindle".
10
Cows can sleep standing up, but they can only dream lying down.
745
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255