LIttle Black Caddis - Larvae
.............................Fly Fishing Yellowstone National Park
The larvae of these species form dark square cases made of small sticks or plant
material. You will find these chimney cases dangling from rocks and anything else they
can attach to in many of the streams in Yellowstone. They attach their cases to objects
with silk. The unique shape and structure of the larvae makes them easy to identify.

Trout will eat the larvae, wooden case and all. They are not difficult for the trout to
acquire. They are very plentiful In some of the streams in Yellowstone. They are for the
most part, exposed on the stream substrate and objects in the stream such as rocks.
Imitations of the larvae are usually a hook size 14 or 16.

Larvae Presentation:
Flies representing the larvae of the Grannoms can be fished anytime but they are
probably much more effective two or three weeks prior to a hatch.  In Yellowstone this
may only be possible in a very few streams. Most of the Grannoms have either hatched
or already entered the pupa stage of life by the time season opens.
Choose a method of presentation depending on the type of water you are fishing. In
smooth water you may want to use a down and across presentation. In faster moving
pocket water you may want to use an up and across presentation. They can be fished
with or without a strike indicator.
I do not rate imitating the Grannom larvae very high. I am only mentioning this stage of
life because if the time and place is right,  it is possible and productive to catch trout on
larvae imitations. If you happen to find a large number of the larvae in a stream after
the season opens and you are not having much luck otherwise, then I suggest you try

Coming Up Next:
Little Black Caddis - Pupae

Copyright 2008 James Marsh