There are approximately three chickens for every human on Earth.
13
The Basenji dog is the only dog that is not able to bark.
4
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
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
The reindeer is the only mammal that can see UV light.
17
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2