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Most users ever online was 305 on Mon Nov 18, 2019 11:39 am


Hoverfly ID please

 
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Steve Bullen



Joined: 05 Aug 2008
Posts: 4

PostPosted: Mon Aug 18, 2008 4:31 pm    Post subject: Hoverfly ID please Reply with quote

I was unable to identify this using Stubbs & Falk. Found in Lancaster SD 484603.
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John O'Sullivan



Joined: 05 Oct 2005
Posts: 128
Location: Sandy, Bedfordshire, UK

PostPosted: Mon Aug 18, 2008 9:07 pm    Post subject: Reply with quote

It appears to be a small Eristalis female, Steve. You can see the so-called "Eristalis loop" (a dip, in fact) in one of the middle veins of the wing, not far from the tip. The bright bands on the abdomen are a good indication that it's one of these females. As it's rather a dark individual, I'm tempted to say that it is perhaps nemorum (=interruptus), but a clearer view is needed to eliminate the (usually brighter) arbustorum, another common species, with a longer stigma and unstriped face. Better to be cautious: as others have said, it's not always going to be possible to identify every fly from a single photo. Indeed, there are plenty of species where even a series of sharp pictures from various angles will not be enough.

But of course we all love good pictures of hoverflies! Thanks for this one.

John
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Steve Bullen



Joined: 05 Aug 2008
Posts: 4

PostPosted: Mon Aug 18, 2008 9:37 pm    Post subject: Reply with quote

Thanks John.
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