Though it has a simple look, don't be fooled, because the WD-40 Fly is a nymph that packs a serious punch. Developed in southern Colorado by Mark Engler over twenty years ago, the WD-40 Fly is his fly for matching small BWO nymphs and tiny midges larvae. Tied with a short handful of materials, the WD-40 has a barred tail and wingcase of m