Only 3% of bird species have penises.
0
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
A 42-foot sperm whale has about 7 tons of oil in it.
209
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
A group of unicorns is called a blessing.
304
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5