NymphIsonychia Nymph
The Isonychia Nymph imitates the Isonychia bicolor, one of the larger and more prolific mayflies. Its dark body and robust profile make it an enticing meal for hungry trout, especially during a hatch.
Summer
Intermediate
Trout
Overview
Typically tied on a long-shank nymph hook with a dark brown-to-slate dubbed body, white biot or feather wingcase, and rubber legs. A bead or lead wrap gives it weight. It imitates the large, fast-swimming Iso nymphs that trout love.
Pattern Characteristics
Materials
Hook: Fulling Mill FM50 85, size #12-#16.
Thread: Black, 8/0 or 70-denier.
Tail: 6-8 chocolate brown pheasant-tail fibers.
Rib: Gold Ultra Wire, brassie size.
Abdomen: Isonychia-color Fine & Dry dubbing.
Thorax: Peacock herl.
Hackle: Barred-ginger variant.
Fishing Tips
Season
Summer
Presentation
Best fished on a dead drift, usually with a weighted leader or a small split shot to keep it sub-surface.
When to Use
Use during an Isonychia hatch, typically during the summer months.
Water Type
Ideal for moving water, particularly in rivers and streams.
Rigging Suggestions
Can be used alone or in tandem with a dry fly during a hatch.
Visibility & Floatation
The Isonychia Nymph sinks well and is highly visible due to its larger size and dark color.
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