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Robber Fly

A black robber fly with fetching blue eyes: a male Dioctria atricapilla (Diptera: Asilidae).  Only the males have these blue eyes, in the females they are a brownish bronze.  Nowhere near as common as Dioctria rufipes, which seems to be one of the commonest predators in long grassland at the moment, but I did see a second D. atricapilla in Reading University grounds the following day.

Photo taken in the field below Chazey Wood, near Caversham, UK, on 2011-05-09.

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