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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Dogs sometimes fake being sick to get attention.
26
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13