In the summer of 2004, two decades ago, one of the major media stories was the presence of a mosquito with black stripes that was larger than the native mosquito and caused more painful bites. Originating from Southeast Asia, Sant Cugat del Vallès was the first place in Catalonia where it was detected, almost twenty years after it entered Europe camouflaged in trucks transporting tires. Little by little, the insect has now become a integrate into everyday life every time the thermometer gets hot, to the point that it feels like the tiger mosquito (Aedes albopictus) has become the lord and master of the entire country. A study published this Thursday by a Catalan team in the journal Insects, The study, which includes the first map of invasive mosquitoes, indicates that this species has colonized some 780 of the 947 existing Catalan municipalities. The study is based on the analysis of data collected by both technicians and citizens who have reported the presence of the mosquito through the application. Mosquito Alert, a citizen science project that brings together around forty scientific entities, including the CSIC, the UPF, and the Blanes Center for Advanced Studies (CEAB).