Rabbits in Fort Collins, Colorado, have been spotted with strange horn-like growths on their heads, leading people to nickname them “Frankenstein bunnies” and “zombie rabbits.”
Scientists say there’s no need to worry – the animals are infected with a virus that affects rabbits but not humans or pets. The illness is called Shope papillomavirus, and it has been known about for nearly 100 years.
The virus causes wart-like bumps that sometimes grow long enough to look like horns. These growths usually don’t hurt the rabbits unless they block the eyes or mouth. Most rabbits’ immune systems eventually fight off the virus, and the bumps disappear.
The disease spreads more easily in summer, when fleas and ticks are more active. Wildlife officials in Colorado say it’s not unusual to see infected rabbits during this season.
This virus also has a fascinating history. In the 1930s, Dr. Richard E. Shope discovered it in cottontail rabbits. His research later helped scientists learn about the connection between viruses and cancer. Some believe that stories of “jackalopes,” mythical horned rabbits from North American folklore, were inspired by sightings of rabbits with this disease.
Even though the photos online may look like something out of a spooky movie, experts remind people that these rabbits are not dangerous. They are simply dealing with a natural, though unusual-looking, virus.
