It is taxonomically regarded as a member of the "Culex pipiens" species complex. It evolved from the overground species "Culex pipiens". Antennal fibrillae play an important role in "Culex pipiens" mating practices. A prime example is the ace-1 locus in house mosquitoes, "Culex pipiens". A bioassay "Culex pipiens" was followed to test the activities. "Culex pipiens" do not hibernate during the winter, which differs from many other mosquito species.