Fly Tying Video: The Sulphur Sparkle Dun

The Sulphur Sparkle Dun is the subject of the latest tying video from Michael Yelton. Authored by Craig Mathews of West Yellowstone, Montana, the Sulphur Sparkle Dun is typically fished in slow to moderately slow waters, and can imitate everything from a tiny olive to, of course, the Sulphur (Ephemerella invaria).