It is possible that it may be sick or injured. If you have a question about a bat, call your local Colorado Division of Wildlife office. It is a myth that bats are blind. Actually, all bats can see. Some have small eyes and some have large eyes.
Bats come in all shapes, sizes, and colors with interesting ears and noses.
The bats in Colorado have a wingspan of about one foot or less. They also weigh from about 4 grams, or the weight of a penny, to about 30 grams. It is a myth that bats get caught in your hair. Bat echolocation is more sophisticated than military radar. It is so refined that bats can detect something as fine as a human hair.