Murray's Fly Shop Yellow Drake Dry Fly- Fly Fishing for trout with dry flies can be extremely rewarding and exciting. The season starts in the early Spring with larger dark colored mayflies but as the days become longer and the temperatures rise, the hatching mayflies become lighter in color. This Yellow Drake Dry Fly is designed to imitate those mayflies that hatch in the late Spring and through the Summer. Mayflies like the Potomanthus distinct and Stenonema canadense - or the light cahill "looking" mayflies.