Iron blue dun traditional dry fly from the guys at fish fishing flies
DRYFLIES *
dry trout fishing flies mixed pack 6 types- Troutflies UK
Blue Dun - Wooly Bugger Fly Co.
Turrall CDC Sedge Dark Dun Trout Flies
Try this when blue wing duns are hatching. The wet fly is most likely taken for the nymph stage.
Iron Blue Dun
Iron Blue Dun - 9 great fly patterns for trout & grayling
Trout Dry Flies
Dialing in the Blue Winged Olive Dun - Ascent Fly Fishing
blue dun fishing fly,white moth, grey duster Troutflies UK