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05 nov, Moscow, park, on birch.
Arista and taxi spots on abdomen - like Sarcophagidae.
But there is obvios metallic colour, especialy on abdomen. It leads to Calliphoridae.
Two more fact. Normaly this time in Moscow is full winter. But:
1. Wings look like that of very fresh emerged fly.
2. Today (without camera) I found the same (95% sure) flies rather common on the sunheated wall of house.

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Calliphoridae

As you note yourself, European Sarcophagidae Sarcophaginae are never metallic blue nor green.
(Sarcophagidae Miltogramminae, the other subfamily, are very different)

Theo Zeegers

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Thank you, Theo.

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Caliphoridae, very probably Calliphora especially if common. Blue-grey thorax and blue abdomen with white tessellation will (almost) always by this genus.

Cheers,
Kahis

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I would even say it is Calliphora vicina. Nikita, you should check "Opredelitel nasekomych evropejskoj chasti SSSR" - there are only 4 species and C.vicina is quite easily distinguished

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Thank you Jere and Andrius. This week I'll check it (at home I have only first half of volum with Nematocera and Orthorrapha).