Northern regions of Spain are experiencing a noticeable surge in attacks by aggressive Asian hornets in 2025. These insects, known as Vespa velutina, have not only expanded their range in recent years, but have also altered their usual activity cycle. Previously, they were mainly seen in the summer months, but now encounters are possible from early spring to late autumn.
Experts attribute this rapid spread to mild winters and the absence of persistent frosts. As a result, the hornets not only survive in greater numbers but also build nests in new, previously uncharacteristic locations. The problem is especially acute in Galicia, where a record number of nests were destroyed this year, and the number of captured queens doubled compared to the previous season.
How to identify the Asian hornet and why it is dangerous
Vespa velutina is characterized by its dark brown color, yellow tips on its legs, and a bright orange stripe on its abdomen. Adults can reach up to four centimeters in length. These hornets become aggressive when they feel their nest is threatened and are capable of attacking in groups. Their stings are painful and can cause severe allergic reactions, especially in those with heightened sensitivity.
In recent weeks, tragic incidents in Galicia have been reported where stings resulted in fatalities. Doctors warn that even people without allergies can experience complications if stung multiple times or if venom enters a sensitive area.
What to do if stung and how to reduce the risk of encounters
If you are stung by this species, it is important not to panic. First, wash the affected area with cold water and soap, and apply ice to reduce swelling. In most cases, this is enough to relieve symptoms. However, if you experience dizziness, difficulty breathing, or significant swelling, seek medical attention immediately.
Experts recommend staying away from nests and not trying to destroy them yourself. Before starting any outdoor activities — whether mowing the grass, hunting, or farm work — carefully inspect the area. Loud noises and vibrations can provoke an attack, so avoid making noise near dense thickets.
Prevention is the best protection
Given that the Asian hornet season now lasts from April to November, residents and visitors in the northern regions of Spain should be especially vigilant. Simple precautions and seeking medical help promptly at the first sign of complications can help prevent serious consequences. The spread of Vespa velutina is a challenge for local communities, but awareness and caution can significantly reduce the risks.
