Stone fly nymphs This post was last updated on December 3rd, 2022 at 07:42 pm A black stone fly nymph is a great trout fly. Even a favorite for Michigan steelhead. The Girdle bug or some call it “the Turd” is a popular stone fly nymph pattern. Berry’s Super Stone Nymph This is a very realistic stone fly imitation by long time Idaho based fly fishing guide and noted tier Brian Berry. Box Canyon Stone fly Nymph Stonefly life cycle kit on Amazon