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567 Views 4 Replies Last post: May 23, 2013 9:29 AM by MWJB RSS
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May 18, 2013 12:44 AM

Influx of Lace Weavers

Earlier on in the year, I'd found a spider which Florin helpfully identified in the forums here as Amaurobius fenestralis/similis - http://www.nhm.ac.uk/natureplus/message/26245#26245

 

Two of them had sat quite content at the top of the window in the bathroom for months, keeping the fly population in check, until recently.  We now have what can only be described as quite a substantial influx of these and very similar spiders which are pretty much all black (A. ferox?).

 

Instead of sitting at the top of the window in the bathroom, they've also managed to migrate to the livingroom and are doing things like sitting right in the the middle of the floor, hiding behind cabinets/around the shower or hiding in places in which they're coming in to close contact with us.  The all-black ones in particular are rather large and are somewhat more on the aggressive side.

 

I'm really just wanting to check whether their mating behaviour could be causing them to suddenly go walkies and whether I should/can do anything to discourage them from taking up residence in daft places.

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    May 18, 2013 4:57 PM (in response to allicient)
    Re: Influx of Lace Weavers

    Hello there.

    Indoor living is not that common with these spiders. They prefer cool damp areas normally and have quite a distinctive messy, lacey web. Could you post a macro photo of one of the 'all black' ones.

    Lewis

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      May 19, 2013 6:40 PM (in response to Lewis)
      Re: Influx of Lace Weavers

      I rarely see black ones (had one living by the front door mat for a while) but I see more brown ones indoors, than any other kind of spider. They're pretty bold & often don't flee for cover when caught in the open. I relocate them, unless they stick close to cover, usually patrolling the bottom of my ground level window frames. They do seem to be a common prey item of pholcus phalangioides round these parts?

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          May 23, 2013 9:29 AM (in response to allicient)
          Re: Influx of Lace Weavers

          Hi Peter,

           

          Sure, leaving the window open could be a factor. Mine seem to come in via window vents and mainly seem to congregate in a gap between the bottom of the window & the flooring.

           

          Just for clarification/confirmation, it's the Pholcus that eat the Amaurobius (and just about any other seemingly beefy looking spiders), not the other way around.

           

          Regards, Mark.

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