Gray Drakes
.............................Fly Fishing Yellowstone National Park

Gray Drakes - (Siphlonurus species) - Spinners

The gray drake hatch and spinner fall occurs at different times depending on the
particular stream. On the Firehole River, for example, it normally occurs towards the
end of June to the first week or two in July. The spinners fall can occur anytime from
about the middle of the afternoon until dark. It doesn't last a long time but is usually
fairly heavy, depending on the stream, of course.

Spinners can be important in two different forms of presentation. When the female lays
her eggs she usually flutters over the surface of the water. This could be imitated with
a fly with upright wings. Once the egg laying is complete, the female falls spent into the
water and dies. Spent patterns are preferred to imitate the dieing spinners. You can try
skittering the fly across the water to simulate the female laying her eggs but this can
cause you to more spooked fish than you catch.
The water is normally smooth where the gray drake spinners fall occurs. This means
you may need to use a longer, lighter tippets and make some very good presentations
to the trout feeding on them.  

Coming Up Next:
Gray Drake - (Siphlonurus species) - Fly Pattern Colors

Copyright 2008 James Marsh