a possible third brood..
No interactions present.
Nice record...one for Malcolm Smart.
My Flickr photos...
Stuart Ball's idea, of extra broods.
I noticed a distinct dark patch toward the apical end of the wing, absent on the early March specimen, and Roger Morris suggested brood dimorphism. Several specimens from either end of the season needed though, and it is a variable feature anyway
Importantly however, I got my hover book autographed.
latest pics and diptera videos
Given as a feature in the key, and certainly there on my early year specimens, though it looks very well developed in your pictures.
A northern workshop would be nice...
Lat/Lng: 51.6042, -0.0822
OS grid ref: TQ329912