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
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
Moths are unable to fly during an earthquake.
328
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The reindeer is the only mammal that can see UV light.
17