Authorities in southern France are scrambling to contain an invasion of “electric ants,” a highly invasive species capable of causing severe pain and permanent physical damage. The discovery of a third colony in the Var department has triggered an urgent eradication effort to prevent the insect from spreading further along the Mediterranean coast.
A Dangerous Arrival in the Var
Known scientifically as Wasmannia auropunctata, these microscopic ants—measuring only about one to 1.5 millimeters—were first detected in Toulon in 2022 after a student raised the alarm. Since then, three distinct colonies have been confirmed, with the most recent sighting occurring in March 2026 in Cavalaire-sur-Mer, near Saint-Tropez. The prefecture officially confirmed this third site on April 9, 2026.
The species, native to South America, is recognized by the National Research Institute for Agriculture, Food and Environment (Inrae) as one of the 100 worst invasive species globally. Their presence poses a dual threat to both human health and local biodiversity.
Severe Health Risks and Painful Stings
Despite their diminutive size and coloring—which ranges from yellow and gold to red and brown—the ants are formidable. Experts describe the sensation of their sting as a combination of a bee sting and a stinging nettle burn, often likened to an electric shock.
The medical implications can be grave. According to entomologist Wim Veraghtert, “Their sting is very painful,” adding that a sting near the eye “can even damage the cornea and render [a person] blind.”
The Fight for Containment
To combat the spread, a specialized insecticide treatment is scheduled for deployment in May 2026. The eradication program is being led by Luc Gomel, an agricultural engineer from Montpellier, who is working closely with Olivier Blight, a researcher at the Mediterranean Institute of Biodiversity and Ecology at the University of Avignon.
The urgency of the operation is driven by the risk of the ants migrating into the Occitanie region. Gomel warned that if the Var colonies are not eliminated quickly, the species could establish itself in neighboring areas. He noted that the Roussillon region, with its southern orientation and steep slopes, would be more favorable for the ants than Languedoc, though he cautioned that making definitive predictions is “science fiction” due to the unpredictable nature of climate change, as the species thrives in humid tropical zones.
This biological threat highlights the increasing vulnerability of European ecosystems to non-native species as global temperatures shift, potentially altering the landscape of public health and environmental management in the region.
