There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Lobsters have blue blood.
476
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
Lurch, a Watusi bull, had the largest horns in the world.
32
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cats recognise the voice of their owner, but never evolved to care.
22