Dolphins have names for one another.
18
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 Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255