
Description
The Trico Dun is a dry fly pattern meticulously crafted to imitate the Trico mayfly (Tricorythodes) in its dun stage. Originating in North America, this pattern was developed to match the prolific Trico hatches found in many rivers and streams during late summer and early fall. These tiny insects are a staple food source for trout during this period, and the Trico Dun's delicate and realistic design makes it highly effective in clear, calm waters. Typically tied in small sizes ranging from 18 to 24, the Trico Dun is an essential pattern for anglers targeting selective trout during these abundant hatches.
Pro Tip
Fish the Trico Dun with a dead drift on smooth pools or slow-moving seams during active Trico hatches. Use ultra-fine tippet (6X or 7X) for a natural presentation, and apply floatant sparingly to keep the fly riding high on the water's surface. Pay close attention to subtle rises, as trout often feed gently during these hatches.
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Recipe
Hook: Light wire dry fly hook, sizes 18-24, to match the diminutive size of Trico duns Thread: Black or gray, 8/0 or 12/0, for a slender and clean construction Tail: Sparse microfibers or natural hackle fibers in black or white, tied to mimic the mayfly’s delicate tail Body: Fine dubbing or thread in black, gray, or olive, wrapped thinly to replicate the slim abdomen of the natural insect Wings: Upright or split CDC, poly yarn, or snowshoe rabbit foot fur in white or light gray for a delicate and realistic appearance Thorax: Slightly darker dubbing, such as black or dark brown, to add a subtle contrast and match the natural insect’s profile Head: Thread wraps, finished neatly with a light coat of lacquer for durability