The mosquito species is a known vector of several pathogens and occurs in two distinct bioforms, and . The bioform thrives in urban environments where there are below-ground habitats; it can mate in confined spaces and feed on mammals as well as birds. In contrast, the bioform is found above ground, is thought to require more space for mating, and mainly feeds on birds. The bioform is present in large parts of Sweden but the bioform has previously only been found in major cities. People experiencing mosquito nuisance in southern Sweden submitted mosquito samples as part of a citizen science project, and these samples were analyzed to determine the geographical distribution of the bioform of . Mosquito specimens were identified to the species level by DNA barcoding of the cytochrome C oxidase subunit I (COI) gene, and the bioforms were determined through the CQ11 microsatellite marker. f was observed to be spread across large parts of Gothenburg as well as in the suburbs. This bioform was found both in urban and rural areas at several sites across southern Sweden. In one site, hybrids between the two bioforms were found. The detection of f in several rural areas was surprising, indicating that it may be more widely spread than urban areas alone, where it has been previously reported.
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