Perfect Fly Adult Midge imitations use CDC and hackle to imitate the wings and legs of the insect. Just because they are small doesn’t mean they do not need to be imitative of the real thing. Trout have every opportunity to get a close look at them. These were designed to imitate those very picky trout that feed on flat, smooth water. It should float low in the surface skim, not high as possible on the surface. This better imitates those newly hatched adults that emerge in slick water. Remember, you don’t usually have fast moving water to rely on to help disguise your fly. They usually hatch in very slow moving water.