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
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
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
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Drivers kill more deer than hunters do.
660
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6