A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
The octopus does not have a blind spot.
273
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
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268