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

Gray Drakes - (Siphlonurus species) - Nymphs

The nymphs are very good swimmers that migrate to the shoreline in a manner similar
to that of stoneflies. The big difference is that the gray drakes can swim there and the
stoneflies crawl there. They can dart about swimming in short spurts similarly to small
minnows or baitfish. This is the time that they are in much danger of becoming trout
food and is of course, the best time to fish for trout that are feeding on the gray drake

Nymph imitations should be presented near shorelines in shallower water. You may
want to try imitating the short, erratic, darting nymphs just prior to a hatch. Short strips
of the fly line will do this. The time to do this could be determined by trial and error
during the time period our hatch charts predict such. Another indication would after
seeing the first gray drakes appear on shore. This isn't always easy. The duns are
difficult to find during the day. When the spinners start showing up it may be too late.
The gray drake hatch is not a long one in any area of a stream. You may also actually
find the nymphs in the shallow water. That would be the best indication. Since the
nymphs are swimmers, trout can be taken year round on nymph imitations. This could
be a good strategy to use where there are known concentrations of gray drakes when
there is no hatch to match.

Coming Up Next:
Gray Drake - (Siphlonurus species) - Spinners

Copyright 2008 James Marsh