This is my own creation to imitate the Iron Blue Dun. I’ve experimented a lot with different colours, different materials etc and this is the combination that I found works the best for imitating the I.B.D.
This pattern works well to imitate pale wateries, spurwings and pale coloured olives. Mostly useful in April, May, June and July. It will take trout feeding on the above mentioned flies that are emerging or are returning to the water to lay their eggs.
A great pattern for fishing in the evening time when the trout are feeding on olives or other upwinged flies. In the evening sun all flies have a reddish hue from the weak evening sun and this fly will represent the majority of upwinged duns or spinners.