Hatches Made Easy:

Eastern Blue-Winged Olives - Emergers (Drunella species)


Each of the species may emerge for a period of anywhere from a month to two
months, usually around the middle of the day, depending upon the species and
elevation. Again, depending on the species, they may emerge anywhere from
the first of May until the end of June after most of the other Eastern mayfly
species have hatched and then again, during late August and September. Like
the other species of Blue-Winged Olives, this long emergence period make them
important. Most of the duns we have found were found in late September.
On the average Eastern Blue-winged Olives are larger than the other
Blue-winged Olive species. They will vary from a large hook size 14 to an 18.
Most of them we have found in the Smokies are a hook size 16.
You are not going to find any super hatches of these mayflies. The most we
have seen is five or six duns at any one location. That doesn't necessarily mean
there could not be larger hatches that occur. At the right place and time better
hatches are possible. I base this on the fact that we have found plenty of the
nymphs in most all of the major streams in the Smokies. Considering that they
hatch over a long period of time and that there are more than one species, it
could be that they just don't hatch in large quantities at any one time.

The nymphs emerge anywhere from the bottom to just underneath the surface
of the water. This means there may be a dun accenting to the surface instead of
a nymph. Wet imitations of the newly emerged dun work great.
The duns emerge in the slower moving water immediately adjacent to the runs
and riffles. Most of the duns we have seen on the water were in pockets behind
boulders. Sometimes you will spot the duns perched on the boulders out in the
stream. I suspect that the fact they emerge below the surface has something to
do with their being able to cope with the warmer times of the day and the times
of the year they hatch. This is strictly guessing. I do know that all of the duns we
have found on the streamside were clinging to the bottom of a leaf, upside down.

Fish the emerger imitations just beneath the surface of the water or in the
surface skim in a dead drift. Trailing shuck imitations fished in the skim work
great for this mayfly. You can fish the wet emergers making short upstream or
slightly up and across presentations just like you would a dry fly.
Every time that we have found these duns, we have been able to catch trout on
Blue-winged Olive trailing shuck patterns. That doesn't seem so unusual until
you consider that was usually in the middle of the day during the some of the
hottest days of September.

Coming Up Next:
Eastern Blue-winged Olive - Duns

Copyright 2008 James Marsh