Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Bats sleep 18-20 hours per day.
5
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
The elephant brain weighs about 6,000g.
274
Parrot parents "name" their children with a signature call.
112