Hatches Made Easy:

Small Eastern Blue-Winged Olives - Nymphs and Emergers
(
Attenella species)

05/02/08

Nymph:
Like the larger Eastern Blue-winged Olives of the Drunella genus, the Attenella
attenella
species is a crawler nymph. Most other Blue-winged Olives such as the
Baetis species are swimming nymphs. The Attenella crawler nymphs live down
between the rocks and cobble on the bottom of the riffles and runs. A few weeks
or days prior to emerging the nymphs migrate to the slower flowing, calmer water
near the riffles and runs that they normal live in. Usually this is only a few feet or
so to the slower edges of the current seams, the pockets along the banks of the
stream and pockets behind rocks and boulders.

Presentation:
A weighted imitation fished near the bottom from the faster water of the runs and
riffles to the adjacent slower moving water may be effective. It should be
presented dead drift either on the swing or using a strike indicator just prior to a
hatch.

Emerger:
The attenella duns emerge on the bottom or well beneath the surface and then
assent to the surface as full-grown duns where they dry their wings before
departing the water. In other words, they are real "wet flies".

Presentation:
Early in the hatch, imitations of the emergers should be fished near the bottom
by adding weight to the tippet or using a weighted imitation. This is best
presented on the swing. When the hatch is underway, it is best to present an
emerger imitation just under the surface or floating in the surface skim.

Coming Up Next:
Small Eastern Blue-winged Olives - Duns and Spinners

Copyright 2008 James Marsh