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Berlin, DE - Suitable habitat - August (Tschorsnig lists July to September)

http://www.iucnre...cheme-ver3

species listed for Berlin (my location):
Estheria bohemani (Rondani, 1862)
Estheria petiolata (Bonsdorff, 1866)
Estheria picta (Meigen 1826)

listed for Germany but not for Berlin:
Estheria cristata (Meigen, 1826)

Maybe it is isn't Estheria if you don't recognize it.

according to Tschorsnig's keys:
Scutellum predominantly yellow = cristata
Scutellum black = bohemani

this leaves picta and petiolata.
If size of petiolata is 14mm (Tschorsnig) THEN not petiolata
IF area around m-cu and post angular is browned THEN not petiolata.

cheeks look hairy to me, no visible petiole of R5.
We are left with picta or another genus.

I can add more photos if it helps someone recognize it.
Otherwise, Tachinid sp. unidentifiable by experts. Thread closed.

I hope that you have a Wonderful Day.