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 dragonflies mate, their tails form a love heart.
22
Parrot parents "name" their children with a signature call.
112
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
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Dogs sometimes fake being sick to get attention.
26
There's a lizard known as the 'Jesus Lizard' that can run across water.
11
Cats and dogs can hear ultrasound.
350