Dry FliesFloating Nymph
The Floating Nymph is a classic emerger pattern designed to imitate mayfly nymphs trapped in the surface film during emergence. This elegant pattern features a dubbed body with copper wire ribbing, spade hackle tails and legs, and a gray dubbed casing that represents the splitting wing case of an emerging mayfly. The design rides in the surface film where vulnerable emergers struggle to escape their nymphal shucks, making it irresistible to selective trout.
Spring, Summer, Fall
Intermediate
Trout
Dec 2025
Overview
This Charlie Craven pattern from Charlie's Fly Box showcases a classic emerger design that has proven effective on selective trout. The pattern's effectiveness lies in its ability to ride perfectly in the surface film, imitating the vulnerable stage when mayfly nymphs split their wing cases and struggle to emerge. The barred spade hackle provides realistic mottled coloring for both tails and legs, while the gray dubbing casing mimics the appearance of the nymphal shuck. The gold amber body glows with life when backlit in the surface film.
Materials
Hook: Tiemco 100SP-BL, #10-14
Thread: UNI 8/0, dark brown
Tail: Spade Hackle (dark barred ginger, grizzly, or cree)
Rib: UTC Wire, x-small, copper
Body: Superfine Dubbing, gold amber mix
Casing: Superfine Dubbing, gray
Thorax: Superfine Dubbing, gold amber mix
Legs: Spade Hackle (dark barred ginger, grizzly, or cree)
Behavior & Presentation
Natural Behavior: Mayfly nymphs ascend with swimming kicks followed by passive drift, their gas-filled thoraxes providing near-neutral buoyancy in the top few inches. These pre-emergent nymphs hang suspended below the surface film with legs extended and tails trailing, drifting head-up while still fully encased in the dark nymphal shuck that contrasts with the developing wing tissue visible through the cuticle.
Where Trout Eat It: Trout feed subsurface on ascending mayfly nymphs before they emerge in the surface film.
How to Fish It: Dead drift on 5X-6X tippet. Dress hackle and tail with floatant while leaving body untreated for proper film position.
Best Water: Spring creek tail-outs and riffle edges where emergers concentrate in smooth feeding lanes.
Strike Type: Fish rise with subtle head-and-tail movements or simple snouts breaking the surface—watch for dimples and gentle surface swirls rather than splashy rises during subsurface takes on ascending nymphs.
Fishing Strategy
Rigging Suggestions: Fish on a 9-12 foot leader tapering to 5X-6X tippet for delicate presentations. Dress the hackle and tail with floatant while leaving the body untreated to achieve the proper riding position in the film.
Seasonal Timing: through fall mayfly hatches. Particularly effective during PMD, BWO, and other mayfly emergences when fish key on emergers rather than duns.
Pro Tips: The spade hackle legs help the fly ride properly in the surface film. Apply floatant sparingly to maintain the low-riding emerger profile.
Entomology
Pre-emergent mayfly nymphs ascend toward the surface through a combination of swimming and passive buoyancy, achieving near-neutral density as gases accumulate in the thorax. These ascending nymphs maintain a head-up posture while still encased in the nymphal shuck, drifting in the top few inches of the water column. Fish position themselves to intercept this pre-emergence stage, feeding subsurface with minimal surface disturbance during the most predictable phase of hatch timing.
- Order
- Ephemeroptera
- Common Name
- Mayfly
- Organism Type
- insect
- Life Stage
- emerger