The Asian hornet has raised concerns in Seville since its appearance in several green spaces in September 2026. A biologist specializing in pest control notes that the insect is not more aggressive than a common wasp when isolated. However, the real danger arises when it feels its nest is threatened. Panic reactions, sudden movements, or homemade traps can often worsen the situation. The sting of the Asian hornet is significantly more painful than that of a wasp or a bee. Larger in size than a common wasp, it can inject a larger dose of venom in one go. The pain is intense and localized, often accompanied by visible inflammation at the injection site, and symptoms can last for several hours. For people who are not allergic, the sting is not life-threatening despite its intensity. However, for those with diagnosed allergies to hymenoptera venoms, a severe anaphylactic reaction can occur even with the first sting. Multiple stings can also be dangerous, even without a known allergy, and doctors advise seeking immediate medical attention in both cases. The Asian hornet becomes aggressive only when it perceives a direct threat to its nest. According to ABC Sevilla, the colonies of Vespa orientalis, a closely related species, tend to be more hidden than those of the Asian hornet. As a result, accidentally stumbling upon an active nest is less common with the Asian hornet compared to its relative. When encountering an isolated Asian hornet, remaining still is the best course of action. Swinging arms or trying to hit the insect can provoke it. "If it lands on us, we must let it leave on its own," recalls Daniel Gómez, director of the pest control company Coplaga. Blowing on the insect should also be avoided, as the carbon dioxide in human breath is interpreted as an alert signal. The biologist advises leaving sugared foods or drinks exposed in areas where the insect has been seen, as this can help deter it. Homemade repellents have not been proven effective, and avoiding eating or drinking near a flying hornet remains the safest approach. Traps made with plastic bottles and sweet baits like beer or soda can attract large numbers of local pollinators, such as butterflies and bees, which can be harmful to the ecosystem. Trapping is only effective in the spring, when capturing queens can prevent the formation of new colonies. Outside of this period, killing an isolated hornet has no impact on the colony. The only effective way to reduce the population is to locate and report the nest to municipal authorities or a specialized company. The first colonies of Vespa orientalis were spotted in Seville’s green spaces at the beginning of September.