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
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Only 3% of bird species have penises.
0
In Australia, there are spiders big enough to eat snakes.
20