Black Hoverfly

The hoverflies are almost all gone now: I only saw one on my walk round the lakes yesterday.  So here is a photo of one from back in mid-summer: an all black hoverfly, probably Cheilosia sp. (Diptera: Syrphidae).  The genus Cheilosia contains a lot of all black species and it would be rash of me to try to narrow down the classification any further.

[Note added 2010-09-29: The swollen orange antennae mark this as a female Cheilosia pagana.  See here for further details.]

Photo taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2009-07-27.