Oak processionary moths

The oak processionary moth (Thaumetopoea processionea), a native of mainland Europe, has appeared in London and is breeding on oak trees in Ealing and Richmond. Its caterpillars feed on oak leaves and produce silken nests on the trunks and branches of affected trees.

As well as seriously damaging trees, the caterpillars pose a risk to human and animal health. The tiny hairs from the caterpillar can be blown on the wind and lead to itching skin lesions and, less commonly, sore throats and eye problems.

You are advised not to touch the caterpillar or a nest, even an empty nest. If you think you may have been exposed and have an itching skin rash and/or conjunctivitis or other symptoms, contact your GP, or call NHS Direct on 0845 4647.

If you think you have seen the caterpillars or one of their nests/webs, contact Richmond Council on 0845 612 2660 or email trees@richmond.gov.uk