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a small group of these by the olympic car-park this morning, one of which I collected. What can I look for on this fly to help discover it's Id? I only know how to place a single image here, so there are a couple more of the live fly here.

http://www.fugleognatur.dk/forum/show_message.asp?MessageID=828752&ForumID=36

I have photographed the wings through a microscope and noticed their interesting serrated edge

Jeremy