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
Female kangaroos have three vaginas.
2
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
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
The cat brain weighs about 30g.
167