Oak Processionary Moth

Header photo by Petra Mannooch-Riggs

photo by Henry Kuppen

Photo by Henry Kuppen



Oak Processionary Moth is extending its spread in Richmond Park and South-West London generally. So please be careful when you visit the Park.

May is the time of year when the caterpillars of this invasive Moth are on the move. If you come across the caterpillars or their webbed nests please do not touch them and keep children and pets away.

The hairs of the caterpillars carry a toxin which can be a threat to human health, causing skin rashes, eye irritation and respiratory problems. In high numbers the caterpillars can also cause defoliation of oak trees.

In late April / early May pesticide spraying takes place on oaks in busy areas and those where they have been previously heavily infested. Careful surveying of the whole Park is undertaken by volunteer spotters to locate nests which are then tagged for later removal by specialist operatives using spacesuit-like protective clothing and equipment.

If you come across the caterpillars or their webbed nests please do not touch them and keep children and pets away. Report any sightings to the park office on 0300 061 2200.

Full information here from the Forestry Commission.