Midge / EmergersWD-40
A simple yet effective midge pattern that mimics various stages of a midge's lifecycle. It's a great choice when trout are selectively feeding on midges.
Spring, Summer, Fall
Beginner
Trout

Overview
A simple emerger/nymph pattern featuring a thread body, sparse dubbing thorax, and soft wing made from mallard or Antron. Typically tied in gray, olive, or brown, with a slim profile that matches midge or small mayfly emergers.
Pattern Characteristics
Materials
Hook: #16-22 Tiemco 2487
Thread: Tobacco 6/0 Danville
Tail: Woodduck Gold Mallard Flank
Body: Tobacco 6/0 Danville
Casing: Woodduck Gold Mallard Flank
Thorax: Grey Muskrat or Beaver Dubbing
Fishing Tips
Season
This fly is most effective from spring through fall, when midges are most active.
Presentation
Fish this pattern in the surface film or just below the surface.
When to Use
Use the WD-40 when trout are selectively feeding on midges.
Water Type
This fly works well in both moving and still water.
Rigging Suggestions
The WD-40 can be fished alone, as a dropper behind a dry fly, or in a tandem nymph rig.
Visibility & Floatation
This fly is designed to sit in or just below the surface film, imitating a midge pupa or emerger. Its small size can make it difficult to see, so it's often fished as a dropper behind a more visible fly.