A group of pugs is called a grumble.
10
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
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cows can sleep standing up, but they can only dream lying down.
745
Squirrels forget where they hide about half of their nuts.
698