Some cottontail rabbits in Fort Collins, Colorado, have been drawing attention because they have wart-like growths on their faces that look like horns.

Colorado residents have been spotting rabbits with tentacles on their heads in recent weeks, but it's actually caused by the cottontail rabbit papillomavirus.

As weird and concerning as they appear, the virus that causes the dark, wart-like horns or tentacles to grow on cottontail rabbits is relatively common and usually not anything to worry about, CPW