Bat bites reportedly feel like sharp jabs and may leave tiny marks that look like scratches.

CNN: Are rabies shots needed for any bat exposure?

Wild animals -- especially bats -- are by far the most common cause of rabies exposure in the U.S. Bat bites, which typically occur when a person finds a bat in his home and tries to shoo it out, are responsible for 80% of cases in which the vaccine is given, Willoughby says.

CNN: Four shots enough to ward off rabies