Trout fry flies are useful in any trout water across the world. The Hornberg in yellow lends itself to a fantastic brown trout imitation. The yellow tail and brown head offers a realistic imitation. Fished sub-surface this trout fly is useful in clear water high sun conditions and can move picky trout. Smaller sizes (12-16) can be fished on the surface during summer time yellow sally hatches and even as a golden stone imitation.