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Fly, Possibly Hover with large black femurs on hind legs.
Observed: 13th May 2011 By: williamsnr
Added: 14th May 2011
Fly about 12mm which looks like a hoverfly in flight and which rests with its wings folded over its back. It has noticable thick black femurs on its hind legs. There were large numbers of them on the day I observed it.