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
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Cats recognise the voice of their owner, but never evolved to care.
22
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
There are approximately three chickens for every human on Earth.
13
The octopus does not have a blind spot.
273