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
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Squirrels forget where they hide about half of their nuts.
698
Condoms were originally made of animal intestines or linen.
347
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
The reindeer is the only mammal that can see UV light.
17