Parrot parents "name" their children with a signature call.
112
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cats sleep for 70% of their lives.
8
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
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Denmark has twice as many pigs as there are people.
66