Pests and vermin

Risk to humans

The caterpillar emerges each April and has thousands of irritating hairs, which can cause:

• skin rashes
• sore throats
• breathing difficulties
• eye problems. 

Important: Do not touch them.

If you think you may have been exposed and have an itching skin rash, conjunctivitis or other symptoms, call 999 if it is an emergency or contact your GP if it is not an emergency.

What to do if you see oak processionary moths or caterpillars

If you see any oak processionary moths or caterpillars, report them immediately. 

• If they are on a council-owned tree, call 01895 556000 or email trees@hillingdon.gov.uk.
• If they are on a privately-owned tree, call the Forestry Commission on 0300 067 4442 or email opm@forestrycommission.gov.uk.