From this time of year onwards, the presence of pine processionary caterpillars becomes increasingly common due to milder temperatures. The species can be seen on sidewalks, in gardens, and in forested areas, especially where pine trees are present.

The PSP notes that the insects detach in lines and have urticating hairs that, upon contact, can cause allergic reactions in both humans and animals.

Therefore, the police force recommends that the public not touch the caterpillars or nests in the trees. It is recommended to keep children and pets away. It is also inadvisable to sweep or disturb the nests, as this action can release hairs into the air.

If a nest is found in a public place, the PSP advises the public to report it to the authorities.

The Portuguese PSP warns that pine processionary caterpillars can cause serious injuries to animals, especially to the tongue and snout. Owners should be alert to symptoms such as swelling of the snout, excessive salivation, difficulty swallowing, intense itching, hives, vomiting, lethargy, loss of appetite, difficulty chewing, or changes in the eyes.

If any symptoms are experienced, seek medical or veterinary assistance.

Symptoms appear within minutes or hours and should be treated immediately, as they can lead to serious consequences or even death.