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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A cow produces around 200,000 glasses of milk in her lifetime.
373
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
A dairy cow can produce more milk when listening to music.
446