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Thank you Karsten! On Facebook (sorry, usually I don't ask in parallel, but recently my Syrphidae-questions on diptera.info where not answered - you did answer them all now, thank you!) Jeroen Van Steenis suggested E. obscuripes, but this has never been reported, according to gbif, in Germany but once in the North. Do you have an easyJet hint for me how to distinguish Epistrophe from Parasyrphus - I am really lost here!