Lobsters have blue blood.
476
The Basenji dog is the only dog that is not able to bark.
4
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Jellyfish as a species are actually older than dinosaurs and sharks.
383
Bats sleep 18-20 hours per day.
5
When you shave a guinea pig it looks like a little hippo.
19
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