Picture-winged Flies 2012052002

Picture-winged Flies 2012052002

Observation - Picture-winged Flies 2012052002. Description: The three flies in this photo are on an Ox-eye Daisy. I'd be interested in family/species identification. Are the 'pictures' specific to a species, sex or an individual?

The three flies in this photo are on an Ox-eye Daisy. I'd be interested in family/species identification. Are the 'pictures' specific to a species, sex or an individual?