16/06/2026
Oak Processionary Moth – What You Need to Know
You may have seen warning signs or heard about the Oak Processionary Moth (OPM) in local areas recently. These caterpillars are more than just a nuisance—they can pose a risk to both people and pets.
What are they?
OPM caterpillars are grey with long white hairs and are usually found on oak trees. They often travel in distinctive “processions” (nose-to-tail lines), which is how they get their name.
Why are they a problem?
Their tiny hairs contain a substance that can cause:
Skin rashes and irritation
Eye and throat irritation
Breathing difficulties in some cases
These hairs can be carried by the wind, so you don’t have to touch the caterpillars to be affected.
Protect your pets too
Dogs are especially at risk if they sniff or come into contact with the caterpillars or nests.
What should you do?
Avoid touching caterpillars or their nests
Keep children and pets away from affected trees
Do not try to remove nests yourself
Report sightings to your local council or Forestry Commission
Stay alert
OPM season typically runs from late spring through summer, so please stay vigilant when out walking or enjoying green spaces.
Let’s help keep our community safe—share this post to raise awareness!
