CDC Flavilinea

The CDC Flavilinea imitates the Drunella flavilinea — a smaller Green Drake species that hatches prolifically on Colorado's Western Slope tailwaters and freestone rivers. CDC (Cul de Canard) fibers create a delicate, naturally water-repellent wing profile that sits flush in the surface film with minimal dressing, making it one of the most lifelike and effective dry fly materials for imitating the soft, upright wing of a freshly hatched mayfly dun. On technical water like the Frying Pan and Roaring Fork, where trout have seen every pattern in the box, the CDC Flavilinea's subtle, realistic profile is often the difference between refusals and eats.

The Flavilinea hatch typically runs July through September on Colorado's Western Slope rivers, often overlapping with PMD and Trico activity in the mornings. Fish this pattern dead-drift with no indicator in slow, flat water where selective trout are sipping in the film. The #14 hook size matches the natural profile of Drunella flavilinea precisely — don't size up or you'll spook fish in clear, low summer flows.

• CDC wing — naturally water-repellent, lifelike dun profile that sits flush in the film
• Imitates Drunella flavilinea — smaller Western Slope Green Drake species
• Tied on #14 hook — precise size match for the natural
• Most effective July–September during Flavilinea hatch on Colorado tailwaters
• Fish dead-drift in slow, flat water to selective surface-feeding trout
• Deadly on the Frying Pan, Roaring Fork, and upper Colorado River

Available in store at Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO.