UMVA has learned that a wave of oak processionary moth caterpillars is marching through Surrey, leaving a trail of silky white nests that threaten both people and pets.
These inch‑long larvae move in a eerie nose‑to‑tail procession, draping oak branches with dome‑shaped nests the size of tennis balls. Their dark stripe down the back makes them unmistakable, yet their beauty masks a potent sting that can trigger severe skin rashes and respiratory problems.
Authorities warn that direct contact with the caterpillars or their nests can cause painful hives, itchy welts, and even asthma‑like attacks. Children and dogs are especially vulnerable, as the tiny hairs can become airborne and linger in the air for weeks.
Residents are urged to keep a safe distance, avoid touching the nests, and never attempt to remove them themselves. Instead, they should photograph the location and report the sighting to the local council, allowing trained teams to dismantle the nests safely.
According to information obtained by UMVA, the moth first appeared in the UK in 2006, but its numbers have exploded across south‑east England, turning Surrey’s lush woodlands into a hotspot for the invasive pest.
Council officials stress that public vigilance can curb the spread. By reporting nests promptly, neighbors help specialists target removal efforts before the larvae disperse their irritating hairs into surrounding neighborhoods.
The nests cling to trunks and lower branches, often hidden among leaves, making early detection crucial. Experts recommend scanning oak trees for the distinctive white silk and the subtle, moving line of caterpillars during the spring and early summer months.
While the risk remains low for those who keep their distance, the sheer volume of nests this season has prompted urgent calls for community action. Every photo and location shared with authorities accelerates the response, safeguarding homes, parks, and loved ones.
