Description
Fly Type: This is a classic dry fly designed to imitate the adult stage (dun) of a dark-colored mayfly, specifically as it rests on the surface of the water after emerging. The prominent upright wings and segmented body accurately mimic the natural insect. This pattern is particularly useful for matching specific hatches of darker mayfly species.
Best Suited For: This fly is a key pattern for catching trout (brown, rainbow, and brook trout) and grayling. It is a "match the hatch" pattern, used when you observe fish actively rising to and feeding on naturally dark-bodied mayfly duns during an emergence.
Best Time to Fish: This fly is most effective from late spring through early autumn, aligning with the peak periods of dark mayfly hatches. These hatches can occur throughout the day, but are often concentrated in the mornings or evenings depending on the specific species and weather conditions.
Water Type: This is a freshwater fly.
Where to Fish: The Mayfly Dun (Black) is best utilized on rivers, streams, and spring creeks where specific dark mayfly species are prevalent. Focus on slow-moving pools, gentle riffles, and eddies where duns tend to congregate and where you observe fish rising to them.
Other Value: As with all dun imitations, achieving a perfect, drag-free drift is paramount for success. A delicate cast with a long leader and fine tippet is essential to present the fly naturally and avoid spooking wary fish, especially when they are selectively feeding on specific dark mayflies. This pattern is indispensable for those times when a dark-bodied dun is the primary food source.