The WD-40 is a great pattern for selective fish, and it imitates a small midge or BWO nymph really well! This is a great pattern for both Spearfish and Rapid Creek. Fish it below a larger, heavier fly to get it down. It fishes best in small sizes - 18-24 works extremely well! 

Materials:

• Hook: Tiemco 2487 Size 16-22
• Thread: Ultra Thread 70
• Tail/Wingcase: Coq de Leon
• Abdomen: Ultra Thread 70
• Thorax: UV Ice Dubbing