Locus: Vienna, Austria
Local Time : 12:24 today, 6th of January
Size: length approximately a large thumb. Width much smaller (pic).
Behaviour: possibly attracted by honey in my medicine, along with flies.
Insect ID from photos is difficult, but this is definitely in Syrphidae. The alternating thick and thin stripes on the abdomen resemble very much those in a picture I found here: https://alchetron.com/Episyrphus-balteatus I would say that it is likely in the genus, Episyrphus, which is present in Austria.