Caterpillar Warning: Don't Touch or Burn!

Beware the processionary caterpillar! These insects are appearing in urban areas and can cause allergic reactions. Learn how to protect yourself and your pets.

Caterpillar Warning: Don't Touch or Burn!

Spring is in the air, but so are potential dangers! Health officials are warning about the arrival of the processionary caterpillar, an insect known for causing allergic reactions in both humans and pets. These caterpillars are often seen in long lines, making them easily identifiable – but also easily approached, which is a mistake you want to avoid.

A long line of processionary caterpillars crawling on a pine tree branch.

Why are they dangerous?

The processionary caterpillar possesses urticating hairs that contain a toxic protein called thaumetopoein. Contact with these hairs can cause a range of allergic reactions, from skin irritation and rashes to more severe respiratory problems. Pets, especially dogs, are particularly vulnerable as they may be curious and attempt to sniff or eat the caterpillars.

“It's important to be vigilant, especially if you have children or pets,” advises Dr. Emily Carter, a local allergist. “Even indirect contact with the hairs, which can be airborne, can trigger a reaction.”

What to do if you encounter them

The most important advice is simple: do not touch or burn them. Burning the caterpillars can release the allergenic hairs into the air, potentially affecting a wider area. If you spot a processionary caterpillar nest or a line of caterpillars, report it to your local authorities or pest control services.

Here are some additional precautions:

  • Keep children and pets away from areas known to be infested.
  • Wear protective clothing, such as gloves and long sleeves, if you need to work in an area where processionary caterpillars are present.
  • Wash your hands thoroughly if you suspect you may have come into contact with the caterpillars or their hairs.
A close-up photo of a processionary caterpillar showing its hairy body.

What to do if you have a reaction

If you or your pet comes into contact with processionary caterpillars and experiences an allergic reaction, seek medical or veterinary attention immediately. Symptoms can include skin rashes, itching, swelling, difficulty breathing, and vomiting.

Prevention is always the best approach. By being aware of the risks and taking the necessary precautions, you can protect yourself, your family, and your pets from the dangers of the processionary caterpillar.

A person wearing gloves and protective clothing carefully removing a processionary caterpillar nest from a pine tree.

Stay vigilant and enjoy the spring season safely!

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