The Visual Trigger, "right under your nose" or I should say "above the trout's nose"

In previous posts I’ve discussed the subject of the role of fly color and hue in attracting fish. I thought that this would be a good time to bring up what may be the most important factor such as how fish respond to visual triggers. Ever wonder why the parachute style flies are so effective? I would be willing to bet that most of you would respond to t…