Mosquitoes don't just bite you, they also pee on you.
11
When you shave a guinea pig it looks like a little hippo.
19
Cats and dogs can hear ultrasound.
350
Tigers can see 6 times better at night than humans.
305
Bats sleep 18-20 hours per day.
5
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13