Hatches Made Easy:

Eastern Pale Evening Duns - Nymphs and Emergers

03/26/08

Nymphs:
The nymphs of the invaria species of the Ephemerella genus are crawler
nymphs that prefer riffles and runs with moderate currents. You may also find
them in pockets or the heads and edges of pools. They will move to calmer,
shallower water a few days prior to emerging.  The color of the nymph varies
greatly from yellow to brown. The hook size can range from 12 to 16. Most of
those we have found in the park are a hook size 14.
You will not find these mayflies everywhere you fish. The fast water runs
and riffles typical of the Smokies are just to swift for the clinger nymphs. Areas of
streams with moderate declines rather than steep declines will have far more
Pale Evening Duns. For example, much of Cataloochee Creek flows on a
moderate decline. Moderately flowing water provides a better habitat for the
clingers.  Usually this type of water is found in the lower elevations but not
always.

Nymph Presentation:
Weighted imitations of the nymph should be presented in a dead drift manner in
the riffles, runs and pockets that are flowing moderately, not fast. An upstream
or up and across cast usually works best. You can also use the "high stickin"
method.

Emergers:
The Pale evening duns usually hatch in the afternoon. This usually occurs
between 1:00 and 4:00 P. M.  When the nymphs are ready to emerge they  
propel themselves to the surface and shed their nymphal shuck. The emergers
range from light yellow to a tan color with a gray wing case. They are best
imitated with a hook size 14.  

Emerger Presentation:
I
mitations of the emergers should be presented just under the surface of the
shallow, slower moving water adjacent to the ripples and runs where the crawler
nymphs are found. A down and across, on the swing presentation of a wet
imitation is usually best.

Coming Up Next:
Pale Evening Duns and Spinners

Copyright 2008 James Marsh