The reindeer is the only mammal that can see UV light.
17
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
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12