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 Technical Problem Solver – J:son Mayfly Dun 5 Rust Red (Hook #24) The Rust Red Dun in size #24 is the ultimate choice for those difficult days when trout are feeding on tiny, dark-colored insects in the surface film. This micro-imitation perfectly matches the smallest species of reddish-brown mayflies, but it is also highly effective when fish are keyed in on tiny terrestrial insects like ants or small spiders that have been blown onto the water.
Tied on an incredibly small size #24 hook, this fly is a masterpiece of minimalism. J:son’s realistic foam body in a deep rusty-red hue offers excellent visibility for the angler despite its size, while the anatomical silhouette provides the perfect trigger for fish in crystal-clear water. When you’re facing a "micro-hatch" of dark insects in low-water conditions, the Rust Red #24 provides the realism and buoyancy needed to fool the most suspicious trophy fish.