Sandy Juan Worm

[pittendrigh]

What is the significant difference, between a long red cylindrical lure, tied with a red
synthetic material, whose name is the San Juan Worm, and another long
red cylindrical lure, tied with a different synthetic material?

http://montana-riverboats.com/Pages/Fly-Tying/Montana-Fly-Tiers/Sandy-Pittendrigh/Worms/index.html