A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Dogs sometimes fake being sick to get attention.
26
The elephant brain weighs about 6,000g.
274
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
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59