A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Gorillas can catch human colds and other illnesses.
205
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
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
Dogs sometimes fake being sick to get attention.
26
Parrot parents "name" their children with a signature call.
112
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