Although associated with Halloween and horror movies, bats are nothing to be afraid of. Most bats live on a diet of insects, and are a big help in keeping down the insect population, while others enjoy eating fruits and vegetables. While one species of bat does indeed drink blood, you're not likely to find them in your back yard, and certainly not sucking on your neck. Bats are secretive animals that tend to live in large colonies, and feed at night with the aid of eccolocation (a way of "seeing" with soundwaves.) Although there are other mammals that have learned to glide, bats are the only ones that can actually fly.