Needle Fly Nymphs (Leuctridae Family of Stoneflies)
Adults:
The adults deposit their eggs during the day usually in the afternoons and
probably during the evenings. Fishing an imitation of the eggs layers is almost
like fishing a mayfly dun or spinner. You can use a larger imitation than the
adults because they are always fluttering just above the surface and actually
touch the surface with their wings still fluttering.

There is an amazing difference in the way these stoneflies look flying than they
do when they are not flying. They look much like caddisflies in the air but as you
can see, they are very narrow and long, tiny flies that remotely resemble pine
needles. Flying they look much larger than they actually are. We suspect many
anglers think these stoneflies are caddisflies and a caddisfly imitation may very
well work for the ovipositing females.

Even though these are sometimes called "Black Rolled Winged Stoneflies", they
are mostly dark brown. We have been able to catch trout imitating the egg
layers every time we have tried. It is common to see trout eating them on the
surface in the fall months. It seems most of the activity is in the high elevation
streams although you will find them everywhere there is fast water.
Presentation:
You want to present the adult
imitation where you see the
adults depositing their eggs.
They do that in the same type
of water they hatch in. I vary
the presentation depending on
the circumstances. The
important thing is just to get the
fly where the action is. I do use
a dead drift. Do try to add
action to the fly. You may just
scare trout away. The real adults
do all their maneuvering above
the water, not on the surface.
Copyright 2013 James Marsh
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