Western Green Drakes
.............................Fly Fishing Yellowstone National Park

Western Green Drakes - (Drunella species) - Nymphs

There is some difference in the  dodsi and grandis species of the Western Green Drak
nymphs but not enough to make any difference in the way they are imitated or the fly
you use to imitate them. The only real notable difference is that the
doddsi nymphs
prefer colder faster moving water. The
grandis species is usually found in slower
moving water. Both can and usually do exist in the same streams.  
These nymphs are crawlers that are rather stocky. They cannot swim well at all. They
have three very short tails and are usually a brown or blackish brown color. Some of
them have yellow tints to them but this depends on the particular stream.
doddsi nymphs will move from their fast water habitat to slower moving water before
emerging to hatch. This may only be a few feet depending on the particular stream. The
grandis species usually hatch in the moderate water that they live in.

You may want to try imitating the stocky nymphs a few days prior to a hatch. You will
need to consult our hatch charts to determine when the Green Drakes should hatch for
a particular stream. It varies greatly in the park depending on the location.
Imitating the nymphs in the faster streams with pocket water is best done on the swing.
You can rig the imitation to drift just above the bottom using a strike indicator but it is
best to watch your line and leader for a take. If you make very short up and across cast
and hold your rod high on the swing, you can feel the trout take the fly. I call this the
"high stickin" method. You must be in fast water and approach the runs and riffles
carefully to avoid spooking the trout when you are fishing that short of a line.
In smoother water, you may want to make longer (20 to 25 feet) up and across
presentations and follow the drift to the down and across position. Sometimes a strike
indicator is useful in this situation. With or without the indicator, you should focus on
keeping the fly near the bottom. Remember the non-toxic rule and avoid using lead.

Coming Up Next:
Western Green Drake - Emergers

Copyright 2008 James