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I photographed quite a lot of C. vicina around our house lately. Today I photographed this one and I wonder if this fly could be C. vomitoria (or perhaps C. loewi?). It seems to have a reddish beard. Also, the red spot between the eyes puzzles me, as none of the vicina I photographed has it.
I read several forum topics about the two, but I still cannot be sure. The anterior spiracle is an important character, but I have no idea what that is :(, let alone if it can be seen in these photographs.

Thanks in advance for your help!