Hoverfly

From back in mid summer, a hoverfly that doesn't look like a hoverfly: a Brachyopa sp,  possibly Brachyopa bicolor (Diptera: Syrphidae), but there are several other species on the UK list that it could also be.  It was in a woodland clearing, near a recently cut tree stump on which a bacterial mat was growing.

Photos taken in the Wilderness, Whiteknights  Park, Reading University grounds, Reading, UK, on 2011-06-13.