Following on from the photos of the Bibionid fever fly the other day, here are some photos of heather flies, Bibio pomonae, (Diptera: Bibionidae), that I took about a month ago, on the hills above Guisborough. This species is usually found in highland areas (in England, at least). Females, like the one above, have small eyes.
Males, like these two, have large eyes.
Photos taken on Hangingstone, near Guisborough, North Yorkshire on 2009-07-30 (the female), and on Highcliff, near Guisborough on 2009-08-06 (the males).