Dry fly

Iron Blue

Tiny dark mayfly dry

Trout · GraylingSurface

Iron blue duns emerge in summer, dark and disdainful. This dry dresses the spirit — small, slate-blue, the sort of fly you tie in size 18 and suddenly understand what sub-surface precision means.

Fish this when

Fish it during early season and late spring and summer and autumn and winter on river. Use it when the naturals are about and fish are feeding seriously. Have it ready for selective moments.

Why it works

It works because the profile reads as iron blue dun; dark olive upwing. Straightforward pattern, proven result. Fish it with confidence when other flies don't move them.

Naturals it imitates