The Iron Blue Dun Dry Fly is a traditional imitation created to match the small, dark Iron Blue hatch frequently encountered on rivers in spring and autumn. These hatches often occur in cooler, overcast conditions when trout feed confidently on the surface despite limited insect activity. Matching this specific hatch can be crucial when fish are rising selectively to small dark duns.
Although primarily designed to imitate the Iron Blue mayfly, this style of dry fly can also suggest a variety of adult aquatic and bankside insects. Its slim body, upright wing and balanced hackle allow it to represent different surface bugs while maintaining a delicate footprint on the water. The pattern is tied to sit correctly in the surface film, offering reliable buoyancy and a natural presentation suited to careful, technical fishing situations.
The subtle blue grey and dark tones create a clear silhouette in low light, making it particularly effective during dull weather or late-season conditions when trout key in on darker insects.
Please note all of our fishing flies are barbless unless otherwise stated.
Iron Blue Dun Dry Fly Specifications
Tag - Floss Red
Tail - Cock Iron Blue Dun
Body - Mole Skin
Wing - Half Mallard
Hackle - Cock Iron Blue Dun
Head - Black Silk
Hook - Barbless, Mustad of Norway
Target Species - Trout
Why Choose The Iron Blue Dun Dry Fly?
True Hatch Imitation
Accurately reflects the size and colour of natural Iron Blue duns.
Delicate Surface Presentation
Designed to float correctly for refined dry fly fishing.
Versatile Insect Representation
Can also resemble various adult terrestrial and aquatic insects.
How To Dress The Iron Blue Dun Dry Fly
Apply Floatant To Hackle & Wing
Lightly treat the hackle and wing fibres before fishing to maintain buoyancy.
Keep The Body Untreated
Avoid over applying floatant to the body so the fly can sit naturally in the film.
Revive Between Drifts
If the fly becomes damp, dry it with amadou or desiccant powder before recasting.
How To Fish The Iron Blue Dun Dry Fly
Upstream Dead Drift
Cast upstream of rising fish and allow the fly to drift drag free through the feeding lane. Precision presentation is essential during selective feeding.
Match Overcast Hatches
Fish during cool, dull conditions when Iron Blue duns are most active. Trout often feed steadily during these periods.
Target Slow Glides & Tail-Outs
Present the fly in smoother water where trout rise rhythmically. A natural drift without drag will produce the best results.
