Thousands of these at the moment, especiallly on dandelions today.
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Wow! Look at those halteres! (balance organs behind the wings). All flies have them, but they are really obvious on this one.
University of Edinburgh and Biodiversity Observatory (OU)
Fact for the day...These were originally weights held, one in each hand, by ancient Greek long-jumpers. They were like mini dumbells and, somehow, by swinging them back and forth, the athlete could jump prodigious distances, even without a run up! All about balance, as you say...
My Flickr photos...
I'm pretty sure this isn't Bibio johannis - so if it is the same as your previous one then I was wrong. The discal spot is not clearly defined enough to be that species. Your previous photos showed the shape of the hind tarsal segments nicely which you need for the key to work.
Thanks for your help, David. I have ordered the key from the FSC, so should soon be able to sort them out.
I should have said that I took several specimens, including the one shown here. The key is relatively straightforward to use and the number of species involved low.
Lat/Lng: 53.92239259254, -0.84580510854721
OS grid ref: SE758479
Forestry Commission plantation being returned to wooded heathland