The Green Drake Fly is a large fly that is made to copy an actual fly – the Green Drake. Nothing allusive here. The Green Drake hatches sometime between mid-July and early September depending on the location. The fly is large and can be identified by the green colored body and is a tasty treat to the hungry trout. The copy has green wool body ribbed with gold and a spilt calf tail wings making it a great floater, easy to see on the water, and a necessity during the hatch.