Little Black Caddisfly (brachycentrus species)
The "Little Black Caddisfly" is probably better known from its larva stage. The
chimney cases they exist in are very unique. The hatch is probably better know
by it's western name, the "Mothers Day Hatch". They may hatch on Mothers Day
in some of the streams in the nation but the fishing season is closed at that time
on some streams. They are also called American Grannoms. They exist in trout
streams throughout the nation.
The Little Black Caddisflies will be one of the first hatches that occurs on some
streams when the season first opens. They usually start hatching when the water
reaches near 50 degrees Fahrenheit.
The "Little Black Caddis" is the Brachycentrus occidentalis, if you care to know
the scientific name of the insect. There is another species that is common, the
Brachycentrus americanus, that hatches in some streams later in the year but it
is usually not very intense. At that time of the season, many other far more
important species of aquatic insects as well as the terrestrials, are available for
the trout to eat. For that reason, we will not include any detailed information
regarding fishing the americanus hatch. About the only difference is the time of
the hatch. They are other species that are present in good quantities in some
streams. Our Little Black Caddis series of flies will work for any of the
The Brachyentridae family of caddisflies, called the “Short Horned Caddisflies”,
which includes the Brachycentrus genus, is one of the most prevalent families of
caddisflies found on water that supports trout. If it were not for the late date of
the opening of the season in some streams and for the effects of Spring runoff
on some Western Streams, it would probably be considered one of the top
hatches. About the only good part is that except for the Blue-winged Olives, there
is little else hatching at the time the Little Black Caddis hatch when the season
first opens. This means that if conditions are right, on some streams, the Little
Black Caddis hatch can still be significant.
Copyright 2013 James Marsh
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