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Tachinid Fly

From my walk on Sunday: a small grey fly, probably a Siphona sp (Diptera: Tachinidae), on ragwort.  Flies in this genus feed through a thin foldable siphon (proboscis)..  In the above photo the siphon is folded and sticks out forwards from below the head; in the following photo it is partly unfolded.

Photos taken in the field below Chazey Wood, near Caversham, UK, on 2011-11-13.

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