Vampire bats are totally unable to utilize any other source of food than blood. In fact if they don’t drink blood for 48 hours, they will starve to death.
Although vampire bats have actually got twenty teeth, only the very front incisors are used.
A vampire bat can run like a spider and jump like a frog and even do cartwheels.
A 100-bat colony can drink the blood of 25 cows.