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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Cats sleep for 70% of their lives.
8