Residents of Fort Collins, Colorado, have been startled by unusual rabbits with horn-like, black growths on their faces which have been quickly dubbed Frankenstein Bunnies. While their weird appearance has fueled jokes and horror-movie comparisons, wildlife officials say the rabbits are suffering from a well-known viral infection, not a monstrous mutation.
The Virus Behind the Horror Look
According to Colorado Parks and Wildlife, the cottontail rabbits are infected with Shope papillomavirus, a disease that causes wart-like nodules. In some cases, these growths extend outward like horns or tentacles, creating their unsettling look.
“The growths don’t harm rabbits unless they interfere with their ability to eat or see,” said Kara Van Hoose, spokesperson for CPW. “Once the immune system fights off the virus, the growths will disappear.”
The virus is spread primarily by fleas and ticks and is most active in the summer months. Importantly, PetMD notes it poses no risk to humans or pets.
From Myth to Modern Science
While these sightings might seem new, the virus — and the strange rabbit appearances it causes — have a long history.
