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
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
A dairy cow can produce more milk when listening to music.
446
There's a rare breed of pig that looks like a sheep.
14
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
When dragonflies mate, their tails form a love heart.
22