(Siphona)

(Siphona)

Observation - (Siphona) - Global. Description: Lots of these small flies on all the remaining Common Catsear (Hypochaeris radicata). Can they be taken to species from the photo?

Lots of these small flies on all the remaining Common Catsear (Hypochaeris radicata). Can they be taken to species from the photo?