Hatches Made Easy:

Mahogany Duns (Paraleptophlebia species)


Species of the
Paraleptophlebia genus, commonly called Mahogany Duns, are
one of the few mayflies to hatch in the Great Smoky Mountains National Park
during the late summer and early fall months. These mayflies are also called
Blue Quills. This is the same genus that the more familiar
adoptive species, or
Blue Quill, belongs to.
We are not certain as to the exact species that live in the park. The
mollis and guttata species are common in most Eastern streams and probably
exist in the park but we are not certain of it. The
Paraleptophlebia swannanoa
species has been found in the Great Smoky Mountains National Park. Neither of
the above species are considered important; that is, unless you are there when
they hatch. Of course, that is the reason we are including them. They not only
hatch, they hatch in plentiful quantities.
Our guess is that most anglers take them for Blue-winged Olive species. They
are quite different from the numerous species anglers call Blue-winged Olives in
color but are they are the same size as some of the Blue-winged Olives. Those
most plentiful are a hook size 18 or 20.
We have been very successful in catching trout when we have imitated the
Mahogany Duns. They start to appear in August and hatch through the middle
of September. Like the Blue Quills, they hatch in the slower moving shallow
water along the margins of fast water.
At the time of year they hatch, mayfly nymphs must seek oxygenated water to
survive. That is why they are always very close to fast water as opposed to
being many places you would find the Blue Quills in late winter and early spring.

Coming Up Next:
Mahogany Duns - Paraleptophlebia species - Nymphs and Emergers

Copyright 2008 James Marsh