Yellowstone National Park - Perfect Fly Hatch Charts
.............................Fly Fishing Yellowstone National Park

11/24/08

New Hatch Chart - Madison River

We have had a hatch chart for the Madison River in Yellowstone National Park since
we launched the site but we now have
another one on our Perfect Fly site that directly
links to the flies that are needed to imitate each insect, crustacean or marine
species. It is a part of what will be a series of hatch charts for every major trout
stream in the United States and Canada.

We have fished all the major ones in the United States and are well underway on
the Canadian trout streams. In most cases we have taken samples of the aquatic
insect larva and nymphs from the stream to verify what was there. I am comparing
that to what information I can find from anglers, magazines, books and websites. In
some cases there are hatch charts available that are quite extensive and in others
they are almost worthless. In some cases they just list flies that someone suggest.
In many cases, in fact most cases, the caddisflies are listed a green, tan, brown,
etc. ones. That too, is almost worthless information. It may help some in terms of
the adult or dry fly imitations but it helps none in terms of the larvae and pupae
imitations which are the most important stages of life of the caddisflies. Just to make
sure I explain what I mean, I am saying that trout eat far more caddisfly pupae and
larvae than they do adults.

In many cases I know just from being aware of the basic water chemistry, type of
stream, location, etc. that the insects listed are not correct or more often, incomplete
Once you study these bugs for a while you begin to almost be able to identify what
should be in a given stream by knowing the characteristics of it. You cannot go by
that, of course, but it help eliminate many things. By that I mean, just for example,
that in a high gradient, fast flowing, high acidic stream you would be hard pressed
to find any net spinning caddisflies. I could give hundreds of other examples but
you should get what I am trying to say.

Often the insects listed for a certain stream contains bugs that anglers that have
fished the stream for a long time have never noticed or are not aware of. Some live in
certain areas of the stream that the angler has never fished.In some streams right
under our nose we still have a lot of questions to be answered about what insects and
other trout foods are significant. In many cases we will be asking for help and
information from anyone knowledgeable about many of the streams we post hatch
charts for. If anyone has information that may be helpful for the hatch charts on the
streams we have added to date please let us hear from you. We will really appreciate
it. If you see something you question listed on any of our charts, again, please let us
hear from you. We want to improve these as much as possible and we invite you to
help. We will be adding streams as time permits hoping to be finished with the majority
of them by the opening of the seasons on the streams that have closed/open seasons.



Copyright 2008 James Marsh     
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