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When I photographed this fly, I thought it te be Eudasyphora, not being able to see wing venation clear enough. However, the photograph shows wing venation enough to make clear that M1 turns sharply upward, not smoothly as in Eudasyphora. So, not Muscidae but Calliphoridae, I guess. However, for thorax color with extensive grey anterior part seems not to match Lucillia. Then I'm out op options...Hopefully not all of you! So, is speceis ID possible?

Amstelveen, the Netherlands; 25 April. Bordering roadside, close to houses.