Grotesque Zombie Squirrels With Warts Spotted in US Backyards

Several states in the U.S. have reported sightings of squirrels displaying severe dermatological symptoms, including oozing warts, according to multiple animal health officials and wildlife rehabilitation centers. The phenomenon, described as “zombie squirrel” outbreaks, has raised concerns among public health experts about potential zoonotic risks and environmental factors contributing to the spread of the condition.

The first documented cases emerged in late May 2026 in Ohio, where wildlife rehabilitators at the Columbus Wildlife Center noted an unusual increase in squirrels with visible lesions. Similar reports followed in Michigan, Pennsylvania, and New York by early June, according to the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (USDA APHIS). “These animals exhibit facial swelling, skin ulcers, and discolored fur, which are consistent with a viral infection,” said Dr. Emily Torres, a veterinary epidemiologist at the USDA, in a June 20 statement.

Identifying the Cause: A Viral Outbreak?

Initial tests conducted by the Ohio Department of Natural Resources (ODNR) and the Michigan Department of Environment, Great Lakes, and Energy (EGLE) suggest the condition may be linked to a parapoxvirus, a group of viruses known to affect rodents and other small mammals. Parapoxviruses, including the squirrel parapoxvirus (SQPV), are typically not transmissible to humans but can cause severe illness in animals. “While there is no evidence of human transmission yet, the rapid spread among squirrel populations warrants close monitoring,” said Dr. Michael Chen, a virologist at the Centers for Disease Control and Prevention (CDC), in a June 22 interview.

However, the exact strain responsible for the outbreak remains under investigation. The CDC is collaborating with state wildlife agencies to sequence viral samples collected from affected squirrels. “We are analyzing genetic markers to determine whether this is a new variant or a reemergence of a previously known pathogen,” said CDC spokesperson Sarah Lin in a June 23 press release.

Public Health Response and Community Concerns

Local health departments have issued advisories urging residents to avoid handling sick wildlife and to report unusual animal behavior to authorities. In New York, the Department of Health (NYDOH) launched a public awareness campaign, distributing guidelines to prevent human-animal contact and emphasizing the importance of hand hygiene after outdoor activities. “These squirrels are not a threat to humans at this time, but we want to ensure the public remains informed,” said NYDOH Director Linda Martinez in a June 25 statement.

Despite reassurances, some communities have expressed alarm. In suburban Detroit, residents reported finding dead squirrels with visible sores near their properties, prompting calls for increased surveillance. “It’s unsettling to see animals behaving abnormally,” said local resident James Carter, who contacted the Michigan Wildlife Rehabilitation Coalition after discovering a visibly ill squirrel in his backyard. “We’re just trying to understand what’s happening.”

Environmental and Ecological Implications

Experts are also examining whether environmental factors, such as habitat disruption or climate change, may be exacerbating the outbreak. The USDA APHIS noted that squirrel populations in affected regions have experienced increased urban encroachment, which could facilitate closer contact between wildlife and domestic animals. “Stressors like habitat loss can weaken immune systems, making animals more susceptible to infections,” said Dr. Torres, the USDA epidemiologist.

Additionally, the outbreak has sparked discussions about the role of wildlife in transmitting diseases. While parapoxviruses are not typically harmful to humans, the CDC is monitoring for any potential mutations that could increase transmissibility. “We are prepared to act swiftly if new evidence emerges,” said Dr. Chen, the CDC virologist.

What Comes Next?

As of June 26, no human cases of the virus have been reported. However, the CDC and state health agencies continue to track the situation closely. The agency plans to release a preliminary report on the outbreak by mid-July, detailing findings from ongoing viral sequencing and epidemiological analyses. “Our priority is to ensure public safety while avoiding unnecessary panic,” said CDC Director Rochelle Walensky in a June 24 statement.

For now, health officials advise the public to remain vigilant but cautious. “There is no need to alter outdoor activities, but we encourage people to report any unusual animal behavior to local wildlife authorities,” said NYDOH’s Director Martinez. “This is a developing situation, and we will provide updates as more information becomes available.”