Description
Stonefly Nymphs – The Year-Round Secret
Why Stonefly Nymphs are a must-have:
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Protein Power: These nutrient-rich nymphs are a primary food source for trout and grayling all year long.
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Easy Targets: As poor swimmers, they often lose their grip and drift downstream, becoming an effortless "snack" for waiting fish.
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Bottom Dwellers: Unlike many insects, they don't swim to the surface to hatch; they crawl to the shore. This keeps them in the "strike zone" near the riverbed for their entire life cycle.
J:son Tungsten Stonefly Nymph 1 Olive Brown – Barbless (#2)
The Stealthy Catch & Release Giant – Perlodes & Pteronarcys Imitator The J:son Tungsten Stonefly Nymph 1 Olive Brown Barbless in size #2 is a massive 32 mm imitation, combining a heavy tungsten core with a high-quality barbless hook. This "Olive Brown" version is the ultimate natural-toned heavyweight, designed to mimic the large, camouflaged nymphs of the Large Stonefly (Perlodes microcephalus) found in technical, catch-and-release waters.
Why this fly works:
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Ethical Trophy Hunting: Specifically designed for fisheries with barbless-only regulations. The hook ensures a solid hold during the fight but allows for a quick, effortless release—minimizing stress on the large trophy trout and grayling that target this 32 mm meal.
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Rapid Depth Penetration: The integrated tungsten weight allows this substantial nymph to sink like a stone, cutting through heavy surface currents to reach the largest fish holding in the deepest, darkest pockets of the riverbed.
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Ultimate Natural Realism: The Olive Brown palette is the "gold standard" for realism. It perfectly captures the mottled, earthy tones of a mature nymph living among moss-covered rocks. It is significantly more effective in clear or highly pressured water where bright colors might cause suspicion.
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Soft-Body Mechanics: Despite the internal weight, the exterior uses J:son’s signature flexible materials. The legs and segmented body offer realistic micro-vibrations, while the soft texture ensures the fish doesn't immediately detect an artificial object upon striking.
Pro Tip: This is the premier "anchor nymph" for technical big-river fishing. Use it to pull your entire rig down to the bottom in deep, fast-moving runs. Because of its natural color, it is an exceptional choice for the early season when Perlodes species are active and the water is clear but cold.