.......................  ......Fly Fishing Yellowstone National Park


Choosing the Right Fly - Part 13

Summary of the past few articles:
1. The trout’s “window of vision” on the surface of the water is relatively small.
Insects and flies pass through it quickly, especially in fast water.

2. While they can see movement and contrast most all the way around
themselves, they only see objects clearly when they directly face the object to
align it in their narrow area of binocular vision.

3. Attractor or generic flies usually work okay in fast water where the trout have
little time to examine the fly, but trout don’t always feed in fast water. Day in and
day out, most of the time, they feed in slow to moderate water.

4. Attractor or generic flies work best when environmental conditions (water
temperature, oxygen content, water levels, etc.) are prime and multiple hatches
are underway. Simply put, when hungry, aggressive trout have a lot of food to
choose from. When it is easy to catch them.

5. Trout do not have to be feeding “selectively” to be focusing on or keying
in on a particular insect. Most of the time they are feeding they are focusing on
one or no more than a very few insects. Call it opportunistic feeding if you like.
Regardless of how you label it, they are going to feed mostly on the insect or
insects that are most abundant and easiest to acquire at the particular time and

6. You are always better off using specific imitations to imitate the behavior of
the insects or other food the trout are most likely eating at the particular time
and place. Unless a substantial hatch is underway (to repeat the most important
point again) this would most likely be the food that is most plentiful and easiest
for the trout to acquire.

Copyright 2009 James Marsh