Squirrels, beloved backyard creatures, have recently appeared with alarming wart-like growths and oozing lesions that have disturbed Americans nationwide. These “zombie squirrels” show disfigured faces and bodies covered with bumps that look almost otherworldly.
One viral image showed a grey squirrel with a tumor on its mouth. Wildlife experts say this condition is called squirrel fibromatosis or squirrel pox—caused by a virus in the poxvirus family that leads to skin tumors.
The disease spread quickly in areas like Maine in 2023. A wildlife biologist explained that the infection runs its course naturally but warned people not to attempt to capture infected squirrels.
Transmission occurs mainly where squirrels congregate, such as at feeders, through saliva and direct contact—mirroring how illnesses spread among humans in crowds.
Squirrel pox is not a threat to people, cats, or dogs, and only rarely affects domestic rabbits. Mosquitoes are a key factor in spreading the virus among squirrels.
Though ugly, many infected squirrels recover notable health. Videos shared online of recovered squirrels give hope.
Bird feeders should be removed during outbreaks to prevent spreading, and people should maintain safe distances.
“Zombie squirrels” are unsettling but wildlife officials urge calm and caution to ensure these animals’ welfare and safety.
