It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
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
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
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Mosquitoes don't just bite you, they also pee on you.
11
Rattlesnake mating sessions have been known to last more than 22 hours.
232