Dogs sometimes fake being sick to get attention.
26
Cats sleep for 70% of their lives.
8
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
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
Ants don't sleep
15
Crocodile babies don't have sex chromosomes; the temperature at which the egg develops determines gender.
45
Penguins have a gland above their eye that turns saltwater into freshwater.
12