Horsefly

A medium-sized male horsefly, probably a Tabanus sp, possibly Tabanus bromius (Diptera: Tabanidae).  At about 15mm long this was noticably larger than the more common 10mm-long Haematopota pluvialis.  The single horizontal dark band on each eye is correct for T. bromius, but a clearer view of the individual facets on the eye would be needed to confirm the species.

Photos taken in the field below Chazey Wood, near Caversham, UK, on 2011-06-21.