Description
The Mayfly Dun: The Moment of Truth (The Crucial Stage)
The stage of the newly hatched adult Mayfly is called the Dun. This is arguably the most critical phase for the fly angler. Depending on surrounding circumstances such as temperature, wind, and weather, the time it takes before the Dun is able to fly away from the surface will vary.
These newly hatched Mayflies are often an easy and vulnerable target for the fish, and many will end up in Mr. Brown Trout’s stomach. When the hatching is frequent, many fish species might become selective and only feed on Duns.
Our Commitment: Perfect Imitation
Our commitment is to provide imitations of the real insect where the fly has the right shape, size, proportions, and colours, and, not least, leaves the correct print on the surface of the water.
This imitation of an adult mayfly in the Dun stage possesses all the right proportions and properties. It looks natural, feels natural, and fish will eat it.
Our Large-Winged Dun Imitation Features:
- Correct Surface Print: The imitation creates the precise silhouette on the water film that triggers the selective fish.
- Optimal Vulnerability: Designed to mimic the wing-drying, vulnerable Mayfly just before take-off.
- High Quality: Exact proportions and colours perfectly match the natural insect.
Recommendations for Best Results
We do recommend you to use a J:son Swivel for all your fly fishing. However, it is necessary to use a J:son Swivel whenever you are fishing a J:son fly in size 1 or 2 to ensure perfect presentation and minimize line twist.
The Midsummer Specialist – J:son Mayfly Dun 4 Vanilla Cream (Hook #22) The Vanilla Cream Dun in size #22 is a specialist fly designed for those magical, light summer nights and calm mornings. It perfectly imitates the pale, cream-colored mayflies often referred to as Pale Summer Duns or Small White Mayflies. When the water surface is like a mirror and fish are rising to seemingly invisible light-colored insects, this is the pattern that bridges the gap between frustration and success.
Tied on a delicate size #22 hook, this imitation features a realistic foam body in a soft vanilla-cream hue that stands out against the water's surface without being unnatural. The J:son design ensures that the fly sits perfectly in the surface film, mimicking a newly hatched dun struggling to take flight. This is a must-have for technical fishing in lakes and slow-moving river sections where the fish have all the time in the world to inspect your fly.