A standard saying among fly fishermen is that trout spend anywhere from 80 to 90 percent of their time feeding below the water's surface on the immature forms of aquatic insects. Some anglers are even more precise, but whatever the exact percentage, it's safe to say that to fully appreciate any tailwater fishery you will have to learn the fine art of nymphing.

Fly Fishing the Tailwaters (ed. Stackpole Books, 1991) - ISBN: 9780811723435