Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
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