Cats recognise the voice of their owner, but never evolved to care.
22
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
A giraffe's kick is so powerful that it can decapitate a lion.
216
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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A 42-foot sperm whale has about 7 tons of oil in it.
209