The tiger mosquito continues its progression in France. On the 2023 map, updated by Vigilance Moustiques, we discover that four new departments are under red alert. To date, the tiger mosquito has been declared officially established and active in 68 departments in metropolitan France. Paris and the entire Ile-de-France region, namely Seine-et-Marne, Yvelines, Essonne, Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne and Val-d'Oise, are concerned.