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First Mosquitoes Confirmed in Iceland as Cold‑Tolerant Species Arrives

Scientists link the insects’ appearance to rapid regional warming, prompting calls for closer monitoring.

Overview

  • Entomologist Matthías Alfreðsson at the Natural Science Institute of Iceland verified three Culiseta annulata collected in Kiðafell, Kjós.
  • The confirmed specimens—two females and one male—were taken from wine ropes used to attract moths.
  • Citizen scientist Björn Hjaltason trapped the insects on October 16 and submitted them after posting to the Insects in Iceland Facebook group.
  • Culiseta annulata can survive winter by sheltering in basements or barns, raising the prospect of local persistence even in cold conditions.
  • Researchers cite Iceland’s rapid warming—about four times the northern hemisphere average—and note parallel northern range expansions, including recent Aedes detections in the UK, while stressing this finding does not signal a new tropical disease threat.