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
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Early American humans hunted car-size armadillos and used their shells for houses.
12
A dairy cow can produce more milk when listening to music.
446