Written by Orvis's Tom Rosenbauer, The Orvis Guide to Hatch Strategies is the definitive book on understanding stream entomology and how to apply it in successful trout fishing. Discover not only what insects live in the stream, but also how to identify them, understand their life cycle, and find the proper fly to imitate them in all stages of their life. From nymph to dry, this book is a must-have for the serious trout angler. USA. Orvis Guide to Trout Fishing Entomology