Authoritative reference to imitating the important trout food forms in rivers and streams of the West 150 patterns to match the super hatches of greatest significance to western anglers Comprehensive--includes mayflies, caddisflies, stoneflies, midges, terrestrials, aquatic worms, baitfish, sculpin, fish eggs, leeches, scuds, sowbugs 1,356 photographs including the undersides of insects to give the trout's eye view, ideal for matching what the trout sees Leeson and Schollmeyer team up to pair incredible photos with descriptions of the insect and solid information on the hatch, life cycle, fly patterns, and step-by-step tying instructions