Spotted Sedge (Hydropsyche species)

The spotted Sedge or species of the Hydropsyche genus of caddisflies, is one of
the most important aquatic insects there are. It may be the most important
caddisfly there are. It certainly rivals the Blue-winged Olives. One reason it is so
important is its lengthy hatch time. You will find them on the water of the various
streams for about the entire season. Another reason they are important is their
sheer numbers. At times some of the Western streams are covered with Spotted
Sedges.

The final part of the hatch, the egg laying activity, doesn't occur until very late in
the day. It is usually well after sunset and sometimes as late as almost dark
before the caddis really get started depositing their eggs. The advantage of this
as I see it, is that you can fish very late in the day after other hatches have
ended. There maybe some mayfly spinner falls going on at the same time, but
basically, this just makes for a full day of fishing.

It is estimated that they represent as much as half of the caddisflies eaten by
trout. I suggest that you be prepared to imitate three stages of life - the larva,
pupa and adult. In the upcoming articles, we will cover the detail of imitating the
Hydropsyche caddisflies or Spotted Sedges, whichever you like to call them.  
Copyright 2009 James Marsh
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