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

07/18/09

Fly Fishing Yellowstone - Pale Morning Dun Spinner

The PMD spinners mate over the water and the males fall dead mostly in the
water. The females will deposit their eggs soon after the mating event. These
spinner falls take place in the late afternoons and during the early mornings
depending on the time of year. Basically, the spinner falls that occur during the
cooler weather takes place in the late afternoons. Those that occur after the
weather has become hot takes place in the early mornings. They will fall over
the same water they hatched from. If they day is warm and the winds are calm,
you can look for a heavier spinner fall than you would see on cool, windy days.

Spinners can be difficult to see even when the insects cover the water. Anglers
could be on the water right in the middle of a good PMD spinner fall and not
even know it was happening. The trout tend to sip the spinners. They provide
little evidence of the spinner fall. A skim net will quickly tell you if they are on the
water and is the best way to determine if the spinner fall is occurring.  Look for
the spinners to be in areas where they congregate, such as the slow water
below riffles, seams of current and eddies.

Presentation:   
Our "Perfect Fly" Pale Morning Dun Spinners is a spent wing imitation of the
PMD spinners. Usually the females actually touch the water to deposit their eggs
but sometimes they drop them from slightly above the water. The trout may take
them while they are depositing the eggs but they are more likely to eat them
after they die and fall spent into the water. The females die as soon as they
have deposited their eggs. It is much easier for the trout to position themselves
downstream from the area they deposit their eggs and eat the spinners than it is
to chase them around when they are depositing the eggs.

We recommend using a very light tippet and making either an upstream or
downstream approach that best provides a drag free presentation. Usually a
down stream, or down and across stream presentation, is best for smooth,
calmer water. An upstream presentation is best for streams with pocket water. In
rough water, you will want to concentrate on the areas the spinners would
congregate in, such as the ends of riffles and runs and the heads of pools.




















This is our
"Perfect Fly" Pale Morning Dun Spinner

Copyright 2009 James Marsh