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
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
A dork is a whale's penis.
327
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20