Nowadays, when people think of bats they immediately equate them with vampires. But only one species of bat a ctually drinks blood, so there's really no need to fear them. In fact, bats have a positive influence on life on the planet. Bats comprise one in every five mammals in the wild, and are one of the largest consumers of insects on Earth. That basically means that they keep the creepy crawlers from taking over! So when you lay your head down to sleep tonight, you can thank your friendly neighborhood bats for making sure you won't wake up next to a spider in your bed.