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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Mosquitoes don't just bite you, they also pee on you.
11
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
In order to enhance the taste, Japanese macaque wash their food in salt water before they eat. They also make snowballs for fun!
7
In Australia, there are spiders big enough to eat snakes.
20
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11