From the damselfly to the whirligig beetle, our nation's streams are teeming with critters. This convenient,
inexpensive guide allows you to identify any that you find--whether you're working on your fly tying, researching
the local insect life, or just mucking around in the river. Also includes information on the river conservation
and management work performed by the Izaak Walton League, making this an especially valuable resource for stream
monitors, biologists, and other specialists.