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13441 Views 5 Replies Last post: Jan 8, 2015 4:48 AM by mrbluemnm42 RSS
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Mar 12, 2014 3:58 PM

Small black flies taking over my flat

If somebody here could shed some light here I'd be extremely appreciative. I live in a brand new flat, just west of London in Buckinghamshire, it's winter, the windows are closed and I am just a little OCD over tidiness and cleanliness, however I have an infestation of these very small flies that group on the windows.  It's generally not in bathrooms but they have been seen there.  They just sit or fly/jump on the glass windows to the outside, until they die, which appears to be within 48 hours or if I go on a swatting spree.  They react to fly spray and are docile enough to sit there whilst I simply use my hand to kill them.

 

They are black in colour, approximately 3mm in length and maybe 1mm across with tucked back wings.

 

Thinking drain flies, I covered over with tape all my drain outlets but nothing was visible in 48 hours. They just seem to keep appearing, in a new, clean and sealed flat.

 

Idea's what they are and why they may be taking over ? If I know this I may be able to find the source. I'm going nuts, I must kill over 15 a day

 

Thanks

Barry

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  • Currently Being Moderated
    Mar 12, 2014 7:51 PM (in response to Barry)
    Re: Small black flies taking over my flat

    Do you have any houseplants?  If so they could be fungus gnats.

    http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=804

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        Mar 13, 2014 4:35 PM (in response to Barry)
        Re: Small black flies taking over my flat

        Might they be merging from hibernation somewhere? For example, there is a crack between my kitchen ceiling and the wall that allows flies from the loft to get in to my kitchen and at this time of year they're more numerous than usual - though not 15 / day.

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    Aug 29, 2014 12:25 PM (in response to Barry)
    Re: Small black flies taking over my flat

    Hi,

     

    I'm not sure if you ever solved your fly problem, Barry, but I can perhaps shed some light on the source.

     

    We're in the process of re-doing our bathroom and downstairs toilet. We had a load of these (identical) flies come out of the waste pipe when my partner was doing the plumbing. There are now lots of them up at the window and I found this post searching for effective methods of getting rid of them!

     

    All searches for drain/sewer flies brought up images of the wrong fly... these you have pictures of, are the same as the ones we're having problems with.

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    Jan 8, 2015 4:48 AM (in response to Barry)
    Re: Small black flies taking over my flat

    cluster-flies-control.jpg7579f01.jpgDon't know if you found your answer yet but I think your flies are Cluster Flies. They lay their eggs in the soil and emerge in the late spring and into summer. They find cracks and crevices and enter buildings in the hundred and even thousands. They tend to be slow poor flyers and rest with their wings almost overlapping each other. The best thing that can done to keep them out is to seal up all the cracks and crevices you can. If you have french doors a lot of times you can see light coming through where the doors come together the flies will enter that way as well. You may also see them cluster together in dark corners and windows, that is where their name comes from.

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