Denmark has twice as many pigs as there are people.
66
Only 3% of bird species have penises.
0
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
The octopus does not have a blind spot.
273
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
Rattlesnake mating sessions have been known to last more than 22 hours.
232