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
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
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.
25
Tigers, leopards, and jaguars love "Calvin Klein's Obsession for Men". The scent is used to attract animals to cameras in the wilderness, and was even a turn on for one pair of Jaguars who were subject to it.
17
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
Cows can sleep standing up, but they can only dream lying down.
745