(Paraleptophlebia bicornuta)
Characteristics
Three tails. Dark gray wings with streamlined, dark mahogany bodies.
Timing of Hatches
The most important emergence occurs in late August through early October. Duns emerge during mid morning while spinners fall in the later afternoon to early evening hours.
Habitat
Slow to medium fast gravel bottom water. Mahogany Duns are common on the Harriman Park stretch of the Henry’s Fork, the South Fork of the Snake and several other local waters.
Comments
The Mahogany Duns provide some of the finest dry fly fishing of the late summer on the Harriman Park and other waters. They are classified as crawler nymphs. There are a number of other species that emerge throughout the summer but the late season is the best. Emergence takes place at the surface making an emerging nymph pattern very effective when trout are rising.
Patterns
Pheasant Tail Nymph, Mahogany Dun Emerger, Mahagony Dun Parachute, Mahogany Dun Thorax, Slate Tan Nohackle
Hook Sizes
16 & 18