One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Rats can tell the difference between two human languages.
49
A female ferret will die if it goes into heat and cannot find a mate.
143
Frogs cannot swallow without blinking.
41
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 katydid bug hears through holes in its hind legs!
110
Humans and dolphins are the only species that have sex for pleasure.
61
The ant can lift things 10 times its own weight.
33