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

Western Green Drakes - (Drunella species) - Duns

Trout will definitely eat the large duns before they escape the water. Some writers think
the trout become selective on either the emergers or duns. I do not buy that. I think the
trout will eat either one depending on the opportunity available. I do not believe they
become selective on the particular stage of life. I guess it is possible where there are
huge hatches taking place, but most of the time, at least in the park, the hatches are
not that huge. Often in a particular area of a stream, the hatch only last three or four
days and unless it is heavily overcast, only for an hour or two each day.
I mentioned in the emerger article that we normally use a trailing shuck version of the
emerger. That is a dry fly and that is why we prefer it. As long as we can catch fish on
the dry fly, we are going to use one instead of a wet fly or nymph.  You can also catch
fish on dry fly patterns of the dun.  

You will usually be able to spot individual trout rising to the duns and/or emergers. This
is especially true if you are fishing smooth water. Even in fast pocket water you should
still be able to detect the trout eating the duns if you pay close attention.
Trout take the emergers in the surface skim with a swirl that may not break the surface
of the water. When they take the duns they usually do break the surface and are of
course, much easier to notice.
In pocket water we normally stick to short, up or up and across presentations. We try to
focus on the pockets of slower moving water near the fast water runs and riffles. If we
are not able to find an individual fish eating the drakes, we try to cover a lot of water
with the short upstream cast.  
In smooth water we still try to use the up or up and across presentation if we can do so
without spooking the trout. We almost always use a reach cast doing this. There are
times and places, depending on the water, that it is almost impossible to get close to the
trout without spooking them. In these cases you are better off using a down and across

Coming Up Next:
Western Green Drake - Spinners

Copyright 2008 James