The Umpqua Bead-Head San Juan Worm is one of the most productive fly patterns ever created. They are a must-have pattern for any tailwater. Excellent lead fly in two-fly nymph rigs, when picky trout need some extra enticing. Bead head adds weight and gives extra flash for fishing fast, off-color water or deep pools. Sizes: #10, #12, #16. Colors: Worm Brown, Red, Fluorescent Pink, Shell Pink, Fluorescent Fire. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Flies.