Only 3% of bird species have penises.
0
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
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A lion in the wild usually makes no more than twenty kills a year.
186
The elephant brain weighs about 6,000g.
274
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109