What species of flying insect is this? Resembles a fly with the wings of a dragonfly
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.