Engle's Sunken Trico Fly
Engle's Sunken Trico Fly is is an excellent and unique pattern. The pattern is featured in Ed Engle's book Tying Small Flies. Ed developed this fly while fishing trico hatches in Colorado.
Fishing a sunken spinner at the tail end of a trico spinner fall will extend the hatch. Trout continue to feed on the spinners as they become water logged and begin to sink. Excellent when fished as a dropper under a dry fly.