The largest earthworm on record was found in South Africa and measured 22 feet.
151
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9