Just a few years ago, nobody knew what a Sow Bug was. Now they are a staple of the tailwater angler's fly box. The Gray Biot Sow Bug was developed on the famous tailwaters of the Western US by Utah fly fishing guide, Jake Ricks. Sowbugs are an important food item for tailwater trout. This pattern combines a realistic profile with the impressionism of mixed colors to create a fly that keeps catching tailwater trout around the world.