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
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Drivers kill more deer than hunters do.
660
Cats sleep for 70% of their lives.
8
The seahorse is the only fish to have a neck.
12