I see this type of fly quite often in the garden, and thought it might be easy to ID with its protruding 'face', but I've never managed to track it down.
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I'd guess it is either in family Anthomyiidae or Muscidae, but I don't know these groups well enough to go further than that. Would need to see more angles (e.g. wing venation) to make any further suggestions.
Entomologist and biological recorder
Thanks for that Martin, I've attached some extra images to show wing venation and facial features. (Note that these are not the same individual as the first but I'm fairly confident it's the same species.)
Looking in my photo database I see that I nearly always photograph this species in April or May with just a couple of outliers in late March or early June.
Absolutely stunning photographs David, especially the 3rd.
Thanks Dan, I use a Raynox dcr250 close-up filter on a bridge camera for my macros, it really transformed my photography.
One of the features used to distinguish Anthomyiidae from Muscidae is that for Anthomyiidae the anal vein in the wing reaches the edge of the wing; in Muscidae it stops short of the edge.
It's always hard to be certain of wing venation when the two wings are overlapping, but I think I can see the anal vein reaching the edge of the wing. So I think it is probably Anthomyiidae. This is a very poorly-known family, and one that I always struggle with on the rare occasions I attempt to identify them, but one guess is that it could be in genus Phorbia (based purely on the overall look of the fly).
Thanks Martin, that certainly gives me something to look into. I'll try and find a clearer shot of the venation and take a look at the genus you suggest.
I joined diptera.info and posted this fly where it was ID'd as Leucophora, a parasite of Andrena. (As if those poor Andrena didn't have enough problems with the Nomada bees!)
Thanks for reporting back on that David, and good to know we had it in the right family!
Lat/Lng: 52.6, -1.2
OS grid ref: SK5501