Most species of the genus Ameletus are found in the smaller,
fast water streams of the higher altitude streams of the
Western and Pacific states. Four species are worth noting, the
velox, of the Sierra Nevada drainage, the sparsatus, common
in the Yellowstone River and the Cooki.  The
ludens species is
an Eastern mayfly.
There is only one stage of life that is real important to anglers -
the nymph. These mayflies crawl out of the water to hatch so it
is not necessary to imitate the emergers or duns. The
spinners are ocassionally important.
Nymph
Mayflies: Brown Dun
Brown Dun (Imitations)
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Copyright 2013 James Marsh
Fishing the Nymph:
These nymphs are excellent swimmers. Like some of the
other swimmers, these nymphs migrate to the shoreline
and emerge into duns If you intend to fish the shoreline
during a hatch the key is determining when the migration is
occurring. This does concentrate the nymphs somewhat
and increases your odds of success. Otherwise, fish the
normal places nymphs may be found within the stream
such as pools, pockets, runs and riffles.
Presentation:
Fish the nymph in the fast water up until the time they are
ready to emerge. You can use a deep dead drift, on the
swing or a strike indicator. When the nymphs move into
shallow water to emerge, use a slighted weighted imitation
or small split shot with an upstream approach.
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