Penguins have a gland above their eye that turns saltwater into freshwater.
12
Mosquitoes don't just bite you, they also pee on you.
11
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
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