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Dry FliesFlavio

Bruce E. Harang developed this versatile attractor dry fly with parachute-style hackle and visible post for easy tracking in varied light. Dubbed body and CDC wing tips create natural silhouette suggesting both mayflies and caddis while handling choppy water.

Season
Spring, Summer, Fall
Difficulty
Intermediate
Target Species
Trout
Updated
Feb 2026
Flavio fly pattern - imitates Mayflies, Caddis tied for Trout

Overview

Bruce E. Harang developed this versatile attractor dry fly with a parachute-style hackle and visible post for easy tracking in varied light conditions. The dubbed body and CDC wing tips create a natural silhouette that suggests both mayflies and caddis. The buoyant design handles choppy water well while maintaining a delicate presentation on calm surfaces.

Materials

Hook: Umpqua U203 #14, or any longshank curved hook
Thread: Benecchi 12/0, olive
Abdomen: Goose biot, dyed olive
Thorax: Argentinean hare, dyed olive
Wing: CDC, natural; polypropylene (or fine antron), grey
Legs: Whiting Brahma hen saddle, dyed dark olive (or brown partridge, dyed olive)
Head: Argentinean hare, dyed olive

Behavior & Presentation

Natural Behavior: Exhausted adult caddisflies drift helplessly after mating flights, their wings splayed and bodies spent on the surface film. The parachute CDC wing tips and dubbed thorax create a low-riding profile suggesting the vulnerable, motionless posture of spent Trichoptera in smooth glides.

Where Trout Eat It: Trout sip emergers in Great Lakes tributary surface film, concentrating in smooth glides with visible post tracking.

How to Fish It: Float parachute design dead drift while CDC wing tips add natural movement, using post for visibility in choppy conditions.

Best Water: Fish pool tail-outs with glassy surface, slow inside bends with back eddies, and spring-fed sections with uniform flow.

Strike Type: Selective trout sip spent caddis with subtle dimpling rises or confident takes; observe the rise form and lift the rod when you see the take.

Fishing Strategy

Rigging Suggestions: Fish on 9-12 foot leader with 4X-5X tippet. Visible post allows use as indicator fly in dry-dropper rig while maintaining fish-catching capabilities.

Seasonal Timing: Most effective during hatches April through June and activity July through August when water temperatures range 50-65°F. Morning and evening feeding periods from 6-10 AM and 5-9 PM produce best results.

Pro Tips: Parachute hackle creates stable footprint in choppy water while CDC wing tips provide natural movement. Apply floatant to post and hackle for visibility and flotation in varied conditions.

Entomology

Adult caddisflies dance and hover above the water before landing to deposit eggs, then drift helplessly on the current when exhausted from mating flights. Fish have learned to capitalize on these spent insects because they offer protein-rich meals with minimal effort, drifting passively within easy striking distance.

Order
Trichoptera
Common Name
Caddisfly
Organism Type
insect
Life Stage
adult

Pattern Characteristics

Intermediate Difficulty
Trout
Moving Water
Stillwater
Spring
Summer
Fall
Imitates: Mayflies, Caddis
Great Lakes
dead-drift
baetis-hatch
caddis-hatch
classic
modern