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Thanks for that Martin. Must be honest, I didn't realise we had others in this genus. What are the diagnostic features I should be looking out for? (That was the best view I got of the spines.)
The start point is whether there are 4 spines or fewer across the *middle* of the front tibia. If 2-3 it is febrilis or the very rare bispinosus. If 4, it will be femoratus or humeralis.
However, as this is a female with apparently a black body and legs, febrilis seems the front-runner. D. bispinosus is brownish, femoratus and humeralis have red on the legs and sides.
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
Thanks Murdo, that's useful. It sounds like detailed photos are the order of the day! :-)
Apologies for coming to this late. Surely this is febrilis, isn't it? The other three species in the UK are different in the female, as Murdo said above. The obvious dark, smoky wings with pale tip is a character not shared with any of the other three, especially in combination with black legs.
My Flickr photos...
Lat/Lng: 52.6, -1.2
OS grid ref: SK5501