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Hello Henri, i find it easy to maintain a checklist of known Syrphidae in my country, then i search each genus to get an idea of which genera fit a species in my photo. Maybe ten minutes to search. In this case, i find three prominent possibilities:

Meligramma, Meliscaeva, Platycheirus.

I think that Meliscaeva looks most like the species in the photo but i know little about Syrphidae. Perhaps someone can confirm Meliscaeva or offer a better option.