Surrey residents are being alerted to the presence of oak processionary moth (OPM) caterpillars, which pose health risks to both humans and animals. Active from late spring to early summer, these caterpillars can be found primarily on oak trees and possess tiny hairs that contain toxins. Contact with these hairs can result in itchy skin rashes, sore throats, breathing difficulties, and eye irritation. Ellen Nicholson, Woking Borough Council's portfolio holder for green spaces, emphasized the importance of recognizing these caterpillars and maintaining a safe distance. Residents are advised to report any sightings to ensure safe removal of nests, while keeping children and pets away from affected trees. The OPM caterpillars were accidentally introduced to England in 2005 and are now established in much of Greater London and nearby counties. A government-led program aims to control their population and minimize their impact, while areas outside Greater London are designated as free from this pest, with restrictions on the movement of oak plants to prevent further spread.