The growths are most likely caused by a summertime virus common in some U.S. states, but wildlife officials say there is no risk of transmission to humans or other animals.

Rabbits with black, tentacle-like growths sprouting from their faces have been spotted in Colorado. Colorado Parks and Wildlife (CPW) said a viral infection called the cottontail rabbit papillomavirus caused the black growths on the rabbits.

Wildlife officials in Colorado have confirmed a troubling rise in cases of shope papillomavirus, a rare disease causing wild rabbits to grow tentacle-like growths from their heads and mouths. While the condition is not new to science,