Clusiodes species, Druid Fly, 22.5.2014 (1)

Clusiodes species, Druid Fly, 22.5.2014   (1)

Observation - Clusiodes species, Druid Fly, 22.5.2014 (1) - UK and Ireland. Description: These 2 flies were running about on the top of a fallen tree trunk. Sometimes they looked like they were in a territorial dispute, at other times they looked like they were dancing and signalling to each other. I don't know the variation in colour within

These 2 flies were running about on the top of a fallen tree trunk. Sometimes they looked like they were in a territorial dispute, at other times they looked like they were dancing and signalling to each other. I don't know the variation in colour within each species. Are they the same species or 2 species?