The rabbits caused a stir when they were spotted in Fort Collins, CO, according to the Coloradan. They've been dubbed "Frankenstein rabbits" by USA Today. "Cottontail rabbits with horn-like growths on their heads have appeared in Fort Collins in recent weeks," the site wrote on Aug. 13.

Recently, some wild rabbits have been seen in the U.S. with "horn-like" growths spurting from their heads that are caused by a viral infection, according to experts.