Hatches Made Easy:

Sulphur (Ephemerella dorothea) - Duns and Spinners

03/31/08

Duns:
The sulphur duns usually have a sulphur color or yellow body with an orange
tent to them. The wings are gray. The ones found in the Great Smoky Mountains
National Park are a hook size 16. The duns rarely stay on the water very long.
Their wings dry fast and they depart the water very quickly.  

Dun Presentation:
Fish the dun imitations in the slower moving, smooth water where the Sulphurs
hatch.  An upstream presentation is usually best provided you can get the fly to
the trout without spooking the them. You should approach individual fish that are
rising using a down and across presentation. Usually a light, long leader and
tippet is required.

Spinners:
The spinners become a pale yellow color with clear wings. Just before darkness
approaches, the females usually drop their eggs from above the water over the
riffles and then fall spent on the water. The spinners will congregate at the ends
of the riffles, heads of pools and current eddies. This means you need to use a
spent imitation of the spinner. In many cases, especially on bright, clear days,
the spinner fall will occur after you can legally fish. I would not place a great deal
of emphasis on the spinner fall because of the timing of it.

Spinner Presentation:
A down or down and across presentation of the spent spinner pattern works
best because you can deliver the imitation from the ends of the current seams
into the slow moving water where the spinners congregate.  Use as long of a
leader and tippet as practical

Coming Up Next:
Sulphur (Ephemerela dorothea) - Fly Pattern Colors

Copyright 2008 James Marsh