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Northern Germany, Schleswig-Holstein, Behlendorf near Mölln, walking path right by a lake, at a flower of Heracleum sp., Outsidephotos: kuv, 10th of August 2023.
Is my idea - after searching in the threads of Diptera.info forum (s. for example https://diptera.i..._id=111311) - ok? Please help to get the ID.
Greetings Kuv