How to recognize processionary caterpillars?

This detailed guide will help you identify processionary caterpillars, pests known for their harmful impacts on vegetation and human and animal health. Learn to recognize these caterpillars to better protect your environment.

Distinctive characteristics of processionary caterpillars

Processionary caterpillars Pine and oak are easy to recognize by their unique behavior and appearance. Typically, these caterpillars move in long lines, hence their name. They also have very fine stinging hairs, which can be dangerous for humans and animals.

Visual identification of the caterpillar

For accurate identification, observe the following details:

  • Length: Processionary caterpillars can reach up to 3-4 cm long.
  • Coloring: They have a generally gray back with darker sides and are covered with grayish or whitish stinging hairs.
  • Behavior: Their movement in single file is very characteristic, often in procession from the nest to the feeding areas.

The nests of processionary caterpillars

Another significant indicator of the presence of processionary caterpillars is their nests. These nests look like large silky agglomerations clinging to the branches of pine or oak trees. Formed during the winter, they are used by caterpillars to protect themselves from the cold and predators.

Precautions during identification

It is crucial to never touch caterpillars or their nests without proper protection. The hairs of processionary caterpillars can cause severe allergic reactions. Using binoculars can help examine nests safely, avoiding direct contact.

What to do if you suspect the presence of processionary caterpillars?

If you identify this pest in your home, it is advisable to call in professionals for appropriate treatment. Biological control methods, such as the use of natural predators or pheromone traps, may also be considered to minimize negative environmental impacts.

By informing yourself and taking appropriate measures, you will help protect your health, that of your animals and the local ecosystem. This guide hopes to have provided you with the information you need to confidently identify the processionary caterpillars and act accordingly.