Figure 1.

European distribution of Aedes albopictus as of January 2018. Blue dots: high-precision occurrence records derived from the literature and used for modelling (n = 1336). Red and yellow areas: administrative units with established populations and introduced specimens, respectively, according to the European Centre for Disease Prevention and Control [38]. Areas are level-3 administrational units following the nomenclature des unités territoriales statistiques (nomenclature of territorial units for statistics, NUTS) as used by the European Union. For Germany, this corresponds to the district (Kreis) level.