Invasive mosquitoes
These maps show the distribution and surveillance of vectors at ‘regional’ administrative unit level - NUTS3 or equivalent and NUTS2 in Austria, Belgium, Denmark, Germany, The Netherlands, England (UK), Scotland (UK) and Wales (UK).
The maps do not represent the official view or position of the countries.
Distribution maps of invasive mosquitoes
The maps show the current distribution of invasive mosquito species in Europe at ‘regional’ administrative unit level. The maps are based on data (published and unpublished) provided and validated by experts.
Separate maps for the distribution of each of the following exotic mosquito species are currently available: Aedes aegypti, Aedes albopictus, Aedes japonicus, Aedes atropalpus and Aedes koreicus. All these, except Aedes atropalpus, are considered invasive species, establishing locally and spreading. There is also a map combining all these mosquito species.
For invasive species, the possible distribution statuses are:
- Established: An established population (evidence of reproduction and overwintering) of the species has been observed in at least one municipality within the administrative unit.
- Introduced: The species has been detected (but without confirmed establishment) within the administrative unit.
- Absent: Field surveys or studies on mosquitoes were conducted but the species has not been detected within the administrative unit.
- Anticipated Absent: These are administrative units where there are no data, and where the species is anticipated to be absent, based on a distance of at least 100 km from units with observations, and unsuitable climatic conditions.
- Unknown: Data from the administrative unit may be available but there are doubts about the identification and/or the status.
- No Data: No sampling has been performed and no data on the species are available within the administrative unit.
Vector distribution status changes in terms of spatial units since the previous update
Since the previous update (June 2025 for Aedes albopictus and Aedes aegypti, and August 2023 for the other species), the main changes are:
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Aedes aegypti: a new introduction in Luxembourg.
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Aedes albopictus: the updated map shows additional administrative units with established populations in Armenia (1), Bulgaria (1), France (2), Greece (7), North Macedonia (3), Portugal (1), and Romania (3).
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Aedes japonicus: the updated map shows additional administrative units with established populations in Germany (2), France (6), Italy (2), the Netherlands (4), Poland (15), and Slovakia (3). In addition, administrative units where the species was found to be newly introduced are in Tthe Netherlands (1) and Romania (1).
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Aedes koreicus: the updated map shows additional administrative units with established populations in France (1), Italy (2), and Russia (1).
Aedes invasive mosquitoes
The map shows the current known distribution of Aedes invasive mosquitoes (Ae. aegypti, Ae. albopictus, Ae. atropalpus, Ae. japonicus and Ae. koreicus) in Europe at ‘regional’ administrative unit level, as of April 2026.
Aedes aegypti
The map shows the current known distribution of Aedes aegypti in Europe at ‘regional’ administrative unit level, as of April 2026. Since the previous update (June 2025), an introduction has been reported in Luxembourg.
Aedes albopictus
The map shows the current known distribution of Aedes albopictus in Europe at ‘regional’ administrative unit level, as of April 2026.
Aedes atropalpus
The map shows the current known distribution of Aedes atropalpus in Europe at ‘regional’ administrative unit level, as of April 2026.
Aedes japonicus
The map shows the current known distribution of Aedes japonicus in Europe at ‘regional’ administrative leveladministrative unit level, as of April 2026.
Aedes koreicus
The map shows the current known distribution of Aedes koreicus in Europe at ‘regional’ administrative unit level, as of April 2026.
Surveillance for invasive mosquitoes
The surveillance maps shows the regions where surveillance activities for invasive mosquitoes were held in Europe and neighbouring regions.
The map 'Invasive mosquito surveillance effort over 2015–2019' shows the surveillance effort per administrative area, by highest surveillance type.
The map 'Seasonal active surveillance for invasive mosquitoes over 2017–2019' shows the number of different calendar months in which any active surveillance took place per administrative area.