Updated to 2026. With the arrival of spring, outdoor walks and trips with your pet increase, but the risk also increases. processionary, a real threat to dogs and cats in pine forests, trails, and green spaces. Knowing and preventing it is essential for truly pet-friendly travel and vacations.
What is the processionary caterpillar and why is it dangerous?
The processionary moth is the larva of some moths (in Italy especially of pines and oaks). The larvae are covered with stinging hairs which release irritants: contact causes intense inflammation of the skin, mouth, and eyes. In dogs and cats, exposure to the tongue and muzzle can cause necrosis and, in severe cases, respiratory distress and shock.
When and where it meets in Italy
The risk period is approximately from late winter to early summerIn the plains, processions often appear between February and April; in the hills and at altitude they can continue until June. It is found in parks, gardens and woods with pin (including urban pine forests) and, for the species of oaks, even along tree-lined avenues and city green spaces. Climate change has expanded the range and lengthened the risk season.
How to recognize it
- Nidi silky white, tuft-like growths on the tops of pine trees (often south-facing).
- Rows of larvae that advance in procession across the ground on mild, sunny days.
- Needles and branches with abnormal defoliation under host trees.
Risks and symptoms in dogs and cats
- Hypersalivation, oral pain, swollen or purple tongue.
- Swelling of the lips, muzzle, and eyelids; intense itching.
- Vomiting, weakness, fever; difficulty breathing in severe cases.
- possibile necrosis of the tongue if we don't intervene quickly.
Any suspected contact is a veterinary emergency.
Prevention during pet-friendly walks and trips
- Plan your routes by informing yourself about any reports from the Municipality or the Park.
- Avoid pine forests and areas with visible nests or warning signs; prefer open, clear paths.
- Keep the dog on a short leash; for very curious dogs consider a basket muzzle.
- Do not allow anyone to smell or touch rows of larvae or nests that have fallen to the ground.
- When stopping, do not sit under potentially infested pine/oak trees.
- In pet-friendly accommodations, ask if green areas and pine forests are monitored and maintained.
- After going out, check the coat, interdigital spaces, and muzzle; if you notice suspicious hair, do not brush and follow the emergency instructions.
What to do in case of contact
- Move away immediately the animal from the area and prevent it from licking itself.
- Do not rub: The hairs break and release more toxin. Wear gloves.
- If the mouth is involved, keep your head up facing downwards e rinse gently with plenty of running water or physiological saline, without rubbing.
- Contact immediately your veterinarian or a 24-hour clinic and reach her as soon as possible.
- Do not give medications or home remedies without veterinary advice.
FAQ
Can the processionary caterpillar reach city gardens and balconies?
Yes, if there are infested pine or oak trees nearby. The stinging hairs can to be carried by the wind or fall with branches and nests. Keep pets away from host trees and mark nests.
Who should I contact for nurseries in public areas?
Report to the municipality, park manager, or competent authorities. Do not remove Never run nurseries alone: authorized companies and protective devices are required.
Are there any preventative measures?
Yes: mass trapping with pheromones, mechanical nest removal, tree trunk barriers, and endotherapy for professional use. For private areas, rely on qualified operators.
To travel safely with your pet, plan your stops and choose destinations and pet-friendly facilities who take care of green areas: a simple attention can avoid an emergency.
