A must have for any angler west of the Mississippi, this book details 90 hatches common to Western streams, rivers, and stillwater. Color photos and in depth information about mayflies, stoneflies, caddisflies, midges, and terrestrialsincluding key features for identifying the numerous variations, the habitats where you will find them, the time of year and day that you can expect to find hatches, and tips for fishing related to each insect. Additionally, 169 fly patterns are cross-referenced with the bugs that they imitate.