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#1 2015-02-26 12:51:49

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1019

Calliphoridae query - not Calliphora vicina maybe?

Saw this fly 25th Feb, on a Polypody.  About 12 mm body.
It has the right venation, and blue abdomen for a Calliphora species such as vicina.
But with all that pollen, no chance of seeing the anterior spiracle! The colour of the facial area and jowls doesn't seem a particularly good match for C. vicina images I can see - it which should be more red than this one? I can't seem to match it to similar species either.
Am I just getting confused?

Nigel G.


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#2 2015-02-27 00:42:23

ChrisR
Administrator
Name: Chris Raper
From: Reading, UK
Registered: 2008-03-08
Posts: 394
Website

Re: Calliphoridae query - not Calliphora vicina maybe?

Yeah, it's a good guess but I don't think we can prove it sad

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#3 2015-02-27 10:37:53

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1019

Re: Calliphoridae query - not Calliphora vicina maybe?

I see the frequently made advice that:

cheeks are black, and the cheek hairs are orange - classic Calliphora vomitoria.
In C.vicina, the ground colour of the cheeks is orange and the cheek-hairs black.


I am convinced that mine doesn't match that. The lower cheek is golden, with dark-brown hairs, and upper cheek a sort of dark purple-red-brown mix (and hairs round the occiput are white).

Having looked for images of Calliphora species, I can't find one that looks a good match for mine. I have to give up, but I don't think it's one of the usual ones. I can't put my finger on it, but at the time I thought it looked very dumpy, as if it was something else entirely!

Thanks Chris, but I agree that this one isn't going to get a name.

Nigel G.

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#4 2015-02-27 14:02:37

Howard Bentley
Committee
Name: Howard Bentley
Registered: 2008-07-07
Posts: 765

Re: Calliphoridae query - not Calliphora vicina maybe?

The basicosta is clearly not black. Colouring of the face and genae is quite variable in Calliphora vicina. I had one last year which was very dark and wouldn't key out nicely to any British species. It looked like the N. American species C. terraenovae. I sent it to the NHM in London for help, but they couldn't put a definite name to it. I suspect yours really is C. vicina after all.

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#5 2015-02-27 14:45:51

Gateside
DF Members
Name: Nigel Gilligan
From: Cumbria
Registered: 2011-08-26
Posts: 1019

Re: Calliphoridae query - not Calliphora vicina maybe?

Thanks Howard.
I do find it strangely (perversely?) reassuring that, despite having a specimen, it doesn't always mean that an ID is possible. Things don't always fit neatly into boxes. I did wonder whether mine was odd because it was older, but the wings look as fresh as anything. And the images are not wasted anyway - always useful for natural history slide shows!

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