Squirrels usually bring smiles as acrobatic backyard visitors, but lately, photos of squirrels covered in pus-filled lumps and wart-like sores have shocked many Americans online. These “zombie squirrels”—disfigured, oozing, and frightening—have been reported in several states, prompting warnings from wildlife officials.
A viral Reddit post showed a squirrel with a large tumor on its face. Experts identified the culprit as squirrel pox or squirrel fibromatosis, a natural viral infection caused by leporipoxvirus. This disease leads to wart-like fluid-filled tumors mainly appearing on the squirrel’s head and limbs.
The condition has been reported from Maine to Virginia and even Canada, with wildlife officials sharing that while the sight is disturbing, this infection is more common than people think.
The virus spreads rapidly through direct contact and saliva, especially around bird feeders where squirrels gather. This spread resembles how human illnesses pass in crowded places.
Most squirrels survive, unless tumors block essential functions. Another common cause of lumps is botfly infestation, which requires expert removal.
Social media dubbed these affected animals “zombie squirrels,” expressing both fear and fascination. Importantly, squirrel pox does not infect humans, pets, or most other animals. Transmission primarily occurs through mosquitoes.
Despite their scary look, many squirrels recover fully. Videos show once-ill squirrels regaining strength and social behaviors.
Experts advise avoiding handling affected squirrels and temporarily removing feeders to slow the outbreak.
The “zombie squirrels” phenomenon is a reminder of nature’s complex challenges and the importance of watching from a safe distance.
