Proliferation of black flies in Spain: which regions are affected?

This summer, the high temperatures in Spain favored the proliferation of a potentially dangerous invader for health: the “mosca negra“. Also called a blackfly, this little beast has health authorities worried.”The fundamental problem with this insect is that it does not sting, but rather produces a saw-like bite, causing injury and possibly giving rise to very alarming infections.” warns Jorge Galván, the general director of the National Association of Environmental Health Societies (ANECPLA) in the Spanish journal Animal Health.

There black fly is recognizable by its small size and dark color. Like the mosquito, she is hematophagous, that is, the female needs blood for the growth of her eggs. But unlike the mosquito, it does not sting, it bites. And his bite, particularly painful, is accompanied by severe itching, edema and even skin lesions. It can cause allergic reactions that can go as far as anaphylactic shock and therefore lead to hospitalizations. In case of complications after a bite, it is advisable to contact a health professional as soon as possible. Be aware, however, that black flies do not transmit disease.

In order to protect against black flies, the recommendations of the Spanish health authorities are as follows:

• Keep arms and legs covered;
• Use repellents;
• Avoid high-risk areas, especially water points.

Which regions are most affected?

With rising temperatures, black flies are breeding more and proliferating in many areas in Spain. The most affected parts are mainly in the south of the country where high temperatures and humidity are particularly favorable to their proliferation. At present, the places considered at risk are:

• Andalusia
• Aragon
• Catalonia
• The Community of Valencia
• Murcia
• Madrid

If for the moment, black flies are confined to Spain, these insects could settle in other countries such as France as a result of global warming. “Institutions will have to foresee that, year after year, we will be confronted with a continuous increase in the number of black flies and, where they are located, put in place prevention systems“, warns Jorge Galván in an interview withEuropa Press.