Hatches Made Easy:

Green Sedges (Rhyacophila sp) - Pupae


On our hatch charts, we show the Green Sedges hatching from the last week of
April until the first week of July. I feel like this covers the majority of them. I have
also found them hatching in the early fall but not in any concentration or large
quantity. There are so many species, I don't doubt that there are other times of
the year that these caddisflies hatch in quantities worth noting. When a major
hatch of any one species starts, it seems to be about a month before all of them
hatch, deposit their eggs and die.
The pupae swim to surface when emerging. In the Spring, this usually occurs
during the late afternoon hours. In the summer, the emergence takes place in
the evenings.

Imitations of the pupae may be presented on the bottom of the riffles and runs
during the early part of a hatch. Use a weighted, wet fly. Allow it to sink near the
bottom and then bring it back to the surface on the swing. You may also try an
imitation of the pupa presented just under the surface using a dead drift. Trial
and error should tell you which method works best. It greatly depends on the
water you are fishing. Most of these caddisflies hatch from the riffles.

I wouldn't place a great deal of importance on this hatch. However, the Rock
Worm is very much worth imitating anytime before they hatch. If you happen to
discover a large hatch, I would suggest you try fishing a pupa imitation.
Determining when these caddisflies are hatching isn't easy. Most of the time the
only thing you will see is the swirl of a trout. Jumping trout may also indicate a
caddisfly hatch is underway. Once you begin to see lots of Green Sedges on the
banks and in the bushes, it is too late to catch trout on the hatching caddisflies.

Coming Up Next:
Green Sedge Adults (Egglayers)

Copyright 2008 James Marsh