When you shave a guinea pig it looks like a little hippo.
19
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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
Ants have tiny magnetic compasses in their antennae which help them navigate.
9