When dragonflies mate, their tails form a love heart.
22
When cats are happy, they may squeeze their eyes shut.
10
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
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