Martin's post RE the conopid fly, Sicus Ferrugineus, reminded me of the photo I managed to get of this species last year at Crymlyn Burrows.
As well as the distinctive, curled under abdomen, the species frequently piggy-backs on each other. There doesn't appear to be any mating significance to this behaviour, but it is quite distinctive. It's also one of my favourite photo's from last year.
nice shot martin but god they are strange looking
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