The Green Drake (Ephemera guttulatais) one of the largest mayflies that trout have available to them in their diet. The green drake hatches mid-day, and will cause trout to completely abandon any other type of food. The nymph emerges to the surface of the water quickly, and after drying its wings, flies off. This leaves little time for trout to grab a bite, so they become very opportunistic when they see the realistic extended dun fly pattern.
Greg Fryling (San Juan Capistrano,CA,US) | July 30th, 2014
Used this as my go to green drake fly, floats high and is very durable. Had great success using this pattern in Yellowstone in the late July time frame