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Northern Germany, Schleswig-Holstein, Pinneberg-Waldenau near Hamburg, between a housing estate and an edge in the mixed forest Klövensteen, nearby a little pond for fishing, at the metallic railing of a footbridge (beneath birchtrees, pinetrees and oaks); 15th of June 2025; photos: kuv.
First I thougt of Sepsidae but in the Diptera.info Gallery the black spots at the wing looked different. So I changed to Opomyzidae, but there I also couldn't find such a fly. - Please help for ID.
Greetings Kuv