
The processionary caterpillar in Barcelona
The processionary caterpillar in Barcelona is a serious risk for dogs and cats, especially in the spring months. This insect, which is found in the city’s pine trees, releases stinging hairs that can cause severe allergic reactions in our pets. At Veterinari del Clínic, we want to warn you about this danger and give you tips to protect your pet.
Why is the processionary caterpillar dangerous?
Processionary caterpillars descend from trees in single file and may release toxic hairs when they feel threatened. Simple contact with these hairs can cause:
- Irritation and hives on the skin and mucous membranes.
- Swelling of the mouth and tongue, which can lead to choking in severe cases.
- Vomiting and excessive drooling.
- Lesions or necrosis of the tongue if the pet tries to lick them.
In the event of any contact with the processionary caterpillar, it is vital to go immediately to Veterinari del Clínic.
Areas with high probability of the processionary caterpillar
If you walk with your dog in parks and green areas, avoid the following areas where processionary caterpillars are common in Barcelona:
- Montjuïc
- Parque de Collserola
- Parc del Guinardó
- Parc del Laberint d’Horta
- Parc de l’Oreneta
In these areas, it is recommended to keep pets on a leash and prevent them from sniffing around pine trees.
What does Barcelona City Council say about the processionary caterpillar?
Barcelona City Council carries out annual control and prevention campaigns against the processionary caterpillar in the city’s parks and green areas. Among the measures adopted are the fumigation of trees in autumn, the placement of biological traps and the manual removal of nests. However, the presence of these caterpillars is still a recurrent problem, so citizens should remain vigilant.
If you detect processionary caterpillar nests in a public area, you can report them to the City Council through the parks and gardens maintenance service or via the council’s mobile app.

What to do if your pet comes into contact with the processionary caterpillar?
If you suspect that your dog has touched or licked the processionary caterpillar in Barcelona, act quickly:
- Prevent further licking.
- Do not touch the affected area without gloves.
- Call us immediately to avoid serious complications.
At Veterinari del Clínic, we are prepared to deal with any emergency related to the processionary caterpillar in Barcelona. If you suspect that your pet has been in contact with them, don’t hesitate to visit us. Speed in these cases can save lives!
Conclusion on the processionary caterpillar in Barcelona
The processionary caterpillar is a real danger, but with caution and vigilance we can prevent our pets from suffering its effects. Remember to avoid high-risk areas, walk with caution and act quickly in case of any symptoms. At Veterinari del Clínic, we are here to help you and take care of your best friend’s health. Also, remember that you can collaborate by informing the city council if you detect nests in public spaces, thus contributing to everyone’s safety.
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