Fishing the Speckled Peter Caddisfly Hatch
The Speckled Peter (Helicopsyche borealis) is one of those caddisflies that receives
little attention from anglers fly fishing for trout. They are tiny (females hook size 20 and
males 22) brown caddisflies that hatch in large numbers. Our imitation matches the
female which are on the water far more often than the male because they deposit their
eggs, not the males. You would think such a small caddisfly would not be worth imitating
in streams where there are numerous other hatches of much larger insects, but that is
not the case with the Speckled Peter. It can cause the trout to feed just as well as many
This little caddisfly prefers moderate currents as opposed to fast moving water. These
caddisflies are very plentiful in many Western trout streams. They emerge in the
evenings. They also deposit their eggs in the evenings. Your best opportunity using
either the pupa or adult imitation usually comes just before dark.
These are case makers that build their shelter type cases with sand. Although the trout
probably eat the larvae at times, we have not tried to imitate them because we don't think
they represent a major part of the trout's diet.
Copyright 2009 James Marsh
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