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Iceland Just Found Its First Mosquitoes (cnn.com) 44

An anonymous reader quotes a report from CNN: Iceland's frozen, inhospitable winters have long protected it from mosquitoes, but that may be changing. This week, scientists announced the discovery of three mosquitoes -- marking the country's first confirmed finding of these insects in the wild. Mosquitoes are found almost everywhere in the world, with the exception of Antarctica and, until very recently, Iceland, due to their extreme cold.

The mosquitoes were discovered by Bjorn Hjaltason in Kioafell, Kjos, in western Iceland about 20 miles north of the capital Reykjavik. "At dusk on October 16, I caught sight of a strange fly," Hjaltason posted in a Facebook group about insects, according to reports in the Icelandic media. "I immediately suspected what was going on and quickly collected the fly," he added.

He contacted Matthias Alfreosson, an entomologist at the Natural Science Institute of Iceland, who drove out to Hjaltason's house the next day. They captured three in total, two females and a male. Alfreosson identified them as mosquitoes from the Culiseta annulata species. A single mosquito from a different species was discovered many years ago on an airplane at the country's Keflavik International Airport, Alfreosson told CNN, but this "is the first record of mosquitoes occurring in the natural environment in Iceland."
Further monitoring will be needed in the spring to see whether the species can survive the winter and "truly become established in Iceland," Alfreosson said. He said he's not sure climate change played a role in the discovery but "warming temperatures are likely to enhance the potential for other mosquito species to establish in Iceland, if they arrive."
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Iceland Just Found Its First Mosquitoes

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  • by ndsurvivor ( 891239 ) on Friday October 24, 2025 @11:49PM (#65749170) Journal
    Sorry Iceland!
  • by johnnys ( 592333 ) on Friday October 24, 2025 @11:56PM (#65749190)

    Look up all the techniques to get rid of mosquitos. Get rid of standing water, use every tool you can find to get rid of them. Get a screening program in place at your harbors and airports. Drop everything and GET RID OF THE MOSQUITOES!

    If you want to understand how urgent this really is, send a representative to Nunavut in the spring. They will learn just what's at stake.

    • Ever been to Iceland? It's a whole lot of empty. You won't be able to do any of those things.

      Well... maybe you could screen at the airport, with teeny-tiny gates and signs saying "Mosquito Courtesy Lane", but relying on literate mosquitos might not be the best path to success.

      But, odds are that ship has sailed. You don't accidentally find the only three mosquitos on a land mass.

      • by CaptQuark ( 2706165 ) on Saturday October 25, 2025 @02:23AM (#65749318)

        My guess is the first mitigation attempt should be releasing sterile male mosquitoes of those species they find.

        Releasing sterile male mosquitoes is a method called the Sterile Insect Technique (SIT), which involves releasing large numbers of male mosquitoes that have been sterilized by radiation. These sterile males then mate with wild female mosquitoes, but their eggs do not hatch, which suppresses the population over time. This technique is effective for mosquito control because it disrupts the natural reproductive cycle, reduces disease transmission, and is a species-specific method that doesn't harm other insects. If there are only a small number of wild mosquitoes around the coasts, this might reduce the numbers below that needed for a sustainable population.

        • by tlhIngan ( 30335 )

          It's also good because it also means there's no species that naturally feed on mosquitoes in Iceland. So killing all the mosquitoes there will not harm the food chain.

          Killing mosquitoes elsewhere is problematic because the food chain means they're eaten by other species like birds, bats, spiders, etc.

  • Personally, I wouldn't have gone looking for them. I guess someone had an itch of curiosity.

    • Yeah, but you're not everyone.

      I don't know how organised natural history fans are in Iceland, but I know who I'd phone if I found a winged insect that I couldn't positively identify myself (which is most of them) and which I thought might be an invasive species (which I wouldn't really consider, since we already have several tens of species of mosquitoes, and many other genera of biting and non-biting flies). Most counties have a network of "recorders" responsible for collating reports of novel organisms, o

  • He said he's not sure climate change played a role in the discovery but "warming temperatures are likely to enhance the potential for other mosquito species to establish in Iceland, if they arrive."

    Well, warming temperatures is one, probably the biggest, of the signs of climate change. So:

    PICK A LANE!

    • Big oil says..... It never happened, if it did happen it is no big deal, after it happens, it is a hoax and don't believe your own eyes. It is somebody else's fault!
    • PICK A LANE!

      I believe he did pick a lane. He chose to stay in his lane on the study of insects than get out of his lane and comment on global warming.

      I'll see criticisms of Dr. David JC MacKay getting out of his lane on global warming, and this expert on insects might want to avoid similar criticisms. Even then the criticisms of Dr. David JC MacKay doesn't really follow. MacKay wrote his paper on sustainable energy with the assumption that global warming is a problem and CO2 emissions from human activity is the prim

      • That the mosquitos have even lived until October is concerning, but could, as you mentioned, be weather and not climate.
        If the population survives until spring, that'll be a lot more concerning. So on, so forth.
      • What is an expert on insects to offer in commentary on global warming?

        seriously? he can talk about the numerous effects of global warming on the lives of insects. diet, habitats, lifecycles, pollination decline, population, location change, disease, pest increase

    • Science is not a car on a road.

      Dude isn't debating the existence of climate change/warming, he's saying that though attribution is difficult (which is the correct answer), its ability to "enhance the potential for other mosquito species to establish in Iceland" is not controversial.
      Climate Change will drive the expansion of territory of organisms into that which they previously found too costly to survive in.
  • by 93 Escort Wagon ( 326346 ) on Saturday October 25, 2025 @01:23AM (#65749278)

    And many parts of it are also significantly colder than Iceland.

    I suspect that Iceland's former lack of mosquitos has to do with both cold AND isolation.

    • Cold, isolation, duration of warm period (which is shorter in Iceland than areas like Anchorage).

      Many things combine to gate the migration of a species.
      The rather rapid warming of Iceland has no doubt contributed to theirs, as the travel-based break in their isolation is hardly new.
    • And many parts of it are also significantly colder than Iceland.

      The climate of Alaska is almost universally sub-arctic. The climate of Iceland is almost universally tundra. They are very different. There's far more to this than just temperature. Speaking of which, the daily means during the warm season in Alaska averaged over the country are less than 1degree different from Iceland. Mosquitoes are seasonal, Alaska has far colder winters, which brings the year around average down, but isn't appreciably different in the summer.

      • by HiThere ( 15173 )

        FWIW, Iceland has recently had some volcanic activity which ought to have resulted in large areas with warmer than usual rock. I wouldn't be surprised if in some area ponds of water stay melted over the winter (at least at the bottom).

        You've got climate, weather, and terrain...and really local micro-climate.

  • That's for hogging the good cod, and for creating Hakarl.

  • Are we sure none of the DeHavilland wooden wonders didn't fly there in WWII ?

    They were used by Coastal Command

  • I mean, isn't (species) diversity our strength or something?? ;)
    • We are concerned with the stability of our ecosystems. The introduction of exotic species, which can become invasive, was never considered a good thing. In particular parasitic insects which are harmful to the local wildlife... Examples: 1) airport controls for food and live products which can transport pests; 2) exotic flowers from local shops come with a sticker saying purchaser takes responsibility for not releasing the plant into nature (I have seen that, I live in EU).

  • They cite "cold winters" as why mosquitos aren't found in Iceland, but... Iceland doesn't have cold winters. In Reykjavik, their lowest mean daily minimum temperature is -2 C in January. Here in Montreal, it's -14 C, so much colder, and there have always been mosquitos in Montreal.

    I would imagine that Iceland's cold *summers* is probably more responsible. It never gets very warm, with a highest mean daily maximum of 15 C in July, versus Montreal at 27 C.

    • by PPH ( 736903 )

      Here in Montreal, it's -14 C, so much colder, and there have always been mosquitos in Montreal.

      Alaska has [swat] entered the conversation [smack].

All life evolves by the differential survival of replicating entities. -- Dawkins

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