Devaux Gammarus HPN 03 Fly

Product highlights

The Devaux Gammarus HPN 3 Flies are distinguished by an extremely faithful imitation of gammarus, essential prey of salmonids and many freshwater species. Designed for a natural, effective presentation, they provide a controlled drift and excellent water-holding to provoke the wariest takes.

Technical features

• High visual and hydrodynamic realism scud (gammarus) imitation
• Neat tying offering a compact silhouette and a stable profile
• Quality sharp single hook designed for rapid penetration
• Durable finishes for optimal longevity during fishing
• Weight and balance engineered for a natural drift in tight-line nymphing or under an indicator
• Designed by Devaux, a French reference in fly fishing tackle

Benefits and strengths

The Gammarus HPN 3 exploits the feeding instincts of fish that regularly target benthic crustaceans. Its short, slightly rounded profile reproduces the posture of a drifting gammarus, while selected materials ensure subtle, believable movement. This fly is highly effective for chasing trout, grayling and chub when insects are scarce and fish focus on benthic invertebrates. Its versatility covers a wide range of situations, from slow currents to faster runs, offering a discreet presentation and strong visual attraction. The balance of the rig helps keep the fly close to the bottom where fish feed, while limiting snags through precise drift management.

Usage tips

To get the best from the Gammarus HPN 3 Flies, favor tight-line nymphing with a controlled drift, a high-rod position and a tapered leader. In slow water, animate with micro-tugs to mimic the jerky movements of a gammarus; in faster currents, let the run work while maintaining light contact. Under an indicator, set the depth to graze the bottom without snagging. Pair with a fine tippet to encourage takes and preserve an ultra-natural presentation. At the end of a drift, pause and apply a slight lift — this change of rhythm often triggers the strike. Clean and dry the fly after each outing to preserve its effectiveness and longevity.

Testimonials

“Tested in spring and summer 2025, these Devaux gammarus made the difference during timid hatches. On riverwise trout in clear water, the natural drift and compact silhouette outperformed my classic nymphs. A safe bet when fish stay tight to the bottom.”

FAQ

Does this fly work in clear, pressured waters? Yes — its realism and discreet profile make it an excellent choice for educated fish in clear water.
Can it be used year-round? Absolutely. Gammarus are a stable food source; the fly remains effective from early season through autumn, depending on fish activity.
Is it suitable for modern nymphing techniques? Yes — its balance supports precise presentation both in tight-line nymphing and under an indicator, with excellent depth control.