Parts of the US, particularly Fort Collins, Colorado, are currently playing host to rabbits with black tentacles that are definitely not pleasing to look at. They have got black, spike-like growths sprouting from their faces, resembling something between sea anemone tentacles and mediaeval torture devices. And officials say you should absolutely avoid touching them.The unsettling appearance is caused by the cottontail papilloma virus (CRPV), also known as the Shope papilloma virus. This rare condition causes wart-like tumours to erupt on or around the head of a rabbit, eventually hardening into horn-like growths made of keratin, the same stuff your fingernails are made of.Colorado Parks and Wildlife (CPW) officials say they do not believe the virus can spread to humans or pets, but the advice is still clear: do not attempt to handle, rescue, or play with these unfortunate creatures.How It Spreads CRPV is mostly spread via blood-sucking insects like mosquitoes and ticks. Once they bite an infected rabbit, they can pass the virus to the next one they feed on. The good news is that scientists say it is almost never transmitted by direct rabbit-to-rabbit contact and there is no evidence of insect bites passing the virus to humans.First signs include small red bumps that eventually morph into grotesque growths. In extreme cases, these tumours can get so large they block the rabbit’s vision, hearing, or even ability to eat, leading to slow starvation.To Save or Not to Save?On social media, the debate is heating up over whether it is more humane to euthanise severely infected wild rabbits to prevent suffering. Animal control officials have not endorsed any such measures. Their position is simple: the virus does not pose a public health threat, and interfering with wildlife generally causes more harm than good. The standing advice is to leave the animals undisturbed and let nature take its course, however grim it might seem.What About Pet Rabbits?For those with pet rabbits, the threat is real but manageable. Since the virus spreads via insects, the best prevention is pest control, keeping rabbits indoors during peak mosquito activity and using protective enclosures. If a pet does become infected, veterinarians can surgically remove the growths before they become malignant. Occasionally, tumours shrink on their own, but in wild rabbits, they often grow bigger year after year.There is no cure for CRPV in wild rabbits, and the prognosis is rarely good once the growths interfere with basic functions like eating. Wildlife officials stress that the best way to help is to keep your distance, avoid feeding or attempting to “save” them, and report sightings if local authorities request it.These infected rabbits are a reminder of how viruses can warp the natural world in unsettling ways.
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