Residents in Surrey and nearby counties are being warned about the return of the oak processionary moth, a toxic caterpillar that causes severe skin and respiratory irritation. Local councils urge avoidance and immediate reporting of sightings to manage the pest's spread.
Residents in Surrey and surrounding areas are being warned to stay vigilant due to the presence of the oak processionary moth , a toxic pest that poses risks to both humans and pets.
The insect, which nests on oak trees, has been sighted in locations including Woking, Weston Green, and Ditton Common. This caterpillar, native to southern Europe, was accidentally introduced to the UK in the early 2000s and is known for causing skin rashes, eye irritations, sore throats, and breathing difficulties in humans. The hairs covering its body contain a toxin called thaumetopoein, which can become airborne and irritate skin, eyes, and respiratory systems even without direct contact.
Although typically seen only in late spring, the moth caused significant concern in 2023 after an 'invasion' across several counties, including Kent, Berkshire, Surrey, Essex, and Hertfordshire. Now, fears are rising again that the pest is returning this summer, with additional sightings reported in Woking, approximately 30 miles from earlier affected areas, raising concerns about its spread beyond Surrey. Local councils have responded by urging residents to avoid contact with the caterpillars and to report any sightings immediately.
Elmbridge Borough Council previously asked locals to steer clear of certain parks, cricket clubs, and green spaces after nests were discovered, promising to minimize disruption during spraying operations and to clearly signpost treated areas. The Forestry Commission's oak processionary project manager, Andrew Hoppit, emphasized the danger, stating that while the adult moth is small, brown, and nocturnal, the caterpillars are covered in thousands of hairs that carry the toxin.
He warned especially children to stay away, noting that the caterpillars may look appealing but can cause nasty rashes and conjunctivitis. The UK's chief plant health officer, Nicola Spence, highlighted the government's serious stance on managing the pest, citing a robust programme aimed at reducing prevalence and protecting oak trees while assisting landowners in affected regions. Oak processionary moths are predominantly found in southeast England, including London, and feed on oak tree leaves.
Their nests, constructed from white webbing, are often located in tree branches and on trunks. The hairs from these nests and caterpillars can remain irritating for months and are easily carried by wind, making avoidance challenging. The species' spread in the UK is largely attributed to the movement of infected oak trees and possibly natural dispersion. With climate conditions potentially aiding its expansion, experts stress the importance of public awareness and rapid reporting to control outbreaks.
The Department for Environment, Food and Rural Affairs has been approached for further comment as communities remain on alert this season
Oak Processionary Moth Toxic Caterpillar Surrey Pest Outbreak Public Health Warning
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Toxic Oak Processionary Moth Caterpillars Trigger Health Warnings in SurreyResidents in Surrey are warned to avoid oak processionary moth caterpillars after sightings in multiple areas. The insects can cause skin rashes, eye irritation, and breathing problems. Councils are spraying insecticide and urging public vigilance.
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