Bluebottle Fly

From late summer a couple of years ago: a female bluebottle fly, probably Calliphora vicina (Diptera: Calliphoridae).  In C. vicina the lower part of the face is reddish, and the spiracle just behind the eyes (on each side of the thorax) is orange.  In C. vomitoria, which is also common, the lower park of the face is whiter, the spiracle just behind the eyes darker, and the 'chin' sports a bright orange 'beard'.

Photo taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2010-08-22.