Complete guide to aquatic entomology for fly fishers, covering all the important insects and their imitations for the entire United States. Hatch charts, fly pattern recommendations, and important fishing strategies from Paul Weamer. This is the ideal ref
Understanding aquatic insect hatches is like being able to cast an entire fly line. Do you need to cast that far to catch fish? Of course not. But will being able to cast a long distance inhibit your ability to catch fish? Never. Knowing where, and how, insects live and emerge gives anglers yet another piece of the puzzle. I've never heard a fly fisherman exclaim, “I probably would have caught those rising fish if I just didn't know so much about trout stream insects.”
You still need to cast. You still need to present flies in such a manner that fish will accept them. But though no one has ever failed to catch a trout because they knew too much about aquatic insects, plenty of anglers have not caught as big a fish, or as many fish as they could have caught, because they failed to understand the importance of matching a hatch. This is particularly true when fishing for large, wild, selective trout―the ones we all really want to catch.