Dry FliesAntonio's Mayfly Adult
An ultra-realistic dry fly pattern designed to imitate adult mayflies in flat water or spring creeks. Antonio's Mayfly Adult uses CDC, biots, and realistic wing materials to float delicately while mimicking the silhouette and posture of a freshly hatched mayfly.
Spring, Summer, Fall
Beginner
Trout

Overview
Antonio's Mayfly Adult is a hyper-realistic dry fly designed to imitate adult mayflies during a hatch. It features an extended body constructed from dyed foam or a tapered synthetic material, often ribbed for segmentation. The wings are upright and typically made from poly yarn or CDC to mimic the natural mayfly profile. The thorax is dubbed lightly and may include a sparse hackle or no hackle at all to maintain a delicate silhouette. This pattern is carefully balanced to float flush in the surface film and works best in calm water during heavy hatches when fish are keyed in on exact profiles.
Pattern Characteristics
Materials
Hook: #12-18 Tiemco 900-BL or 100SP-BL
Thread: Gray 18/0 Semperfli Nano Silk
Tail: Coq de León rooster saddle fibers
Rib: Extra-small copper wire or copper Krystal Flash
Abdomen & Thorax: CDC fiber dubbing
Sighter: Fire orange Fluoro Fibre
Wing: Natural gray CDC fibers
Fishing Tips
Season
Spring, Summer, Fall
Presentation
Dead drift with no drag on calm water
When to Use
During mayfly hatches when trout are keyed in on adults
Water Type
Stillwater, Moving Water
Rigging Suggestions
Fish solo on long, fine tippet (5X–7X)
Visibility & Floatation
Floats low and delicately; CDC and hackle provide lift; resin head improves durability without affecting floatation