In their first book together since their 1981 classic Western Hatches, aquatic entomologist Rick Hafele and fly fishing author Dave Hughes, combine their extensive knowledge to describe in detail the widespread and diverse western mayflies, unraveling their mysteries, revealing how to identify them, how to match them, and how to fish their imitations. Researched, written, and photographed over a period of more than twenty years, Western Mayfly Hatches covers all mayfly hatches important in the entire range of western states and provinces. Color photos reveal the important aspects of each stage of each important mayfly hatch. Scientifically accurate illustrations by artist Richard Bunse depict the details that will allow you to recognize key differences between species for both nymph and adult stages. A series of fly patterns, from suggestive through impressionistic to imitative, are listed for each stage of each hatch. The full dressing is given for each fly, and each is photographed in color by Jim Schollmeyer. Also included is information on collecting and observing mayflies, mayfly behavior and natural history, fly-tying techniques, presentation methods for nymphs, emergers, duns, and spinners, plus much more. Unique "hatch ranking tables" list the important aspects of each hatch, and provide a means for determining its importance relative to all other hatches. Hatch charts show graphically the emergence period of each hatch throughout the year, and the time of day you might encounter the insect on the water being fed upon selectively by trout. Includes more than 350 color photographs, 75 illustrations, and more than 175 fly patterns, You'll be amazed how much information you'lldiscover within the pages of this book. Western Mayfly Hatches leaves no stone unturned.