Sulphur Dun
As I stated in the previous article, the Sulphur, or Ephemerella dorothea, is one
of the mayflies that are commonly called "Sulphurs" as well as a "Pale Evening
Duns". This is another good reason for using the scientific names rather than
common names. The dorothea is quite similar to the invaria (Pale Evening Dun)
species but there are important differences in color, hatch times, habitat and
methods of imitating them. This mayfly is found in the Eastern U. S. and in some
Mid-western trout streams.
The body of the Sulphur is more of a true sulphur color than the Eastern Pale
Evening Dun. It's body is a tannish, yellow color. The sulphur is also a hook size
and sometimes two hook sizes smaller than the Eastern Pale Evening Dun.
These mayflies usually hatch late in the afternoon from about 4:00 to 7:00 P. M.
They hatch approximately two weeks later than the Eastern Pale Evening Duns.
Generally, you will find Sulphurs where the stream is falling on a low to moderate
decline. These mayflies like slower moving water than the Eastern Pale
Evening Duns they are often confused with. Most of the time you will find them at
the ends of long, slow moving runs; and the heads, sides and tails of larger
pools. Large pockets located within fast water areas may hold Sulphurs. You will
not find any in the typical fast, pocket water streams. When you do find them, you
should be prepared to imitate them.
As I stated in the previous article, the Sulphur, or Ephemerella dorothea, is one
of the mayflies that are commonly called "Sulphurs" as well as a "Pale Evening
Duns". This is another good reason for using the scientific names rather than
common names. The dorothea is quite similar to the invaria (Pale Evening Dun)
species but there are important differences in color, hatch times, habitat and
methods of imitating them. This mayfly is found in the Eastern U. S. and in some
Mid-western trout streams.
The body of the Sulphur is more of a true sulphur color than the Eastern Pale
Evening Dun. It's body is a tannish, yellow color. The sulphur is also a hook size
and sometimes two hook sizes smaller than the Eastern Pale Evening Dun.
These mayflies usually hatch late in the afternoon from about 4:00 to 7:00 P. M.
They hatch approximately two weeks later than the Eastern Pale Evening Duns.
Generally, you will find Sulphurs where the stream is falling on a low to moderate
decline. These mayflies like slower moving water than the Eastern Pale
Evening Duns they are often confused with. Most of the time you will find them at
the ends of long, slow moving runs; and the heads, sides and tails of larger
pools. Large pockets located within fast water areas may hold Sulphurs. You will
not find any in the typical fast, pocket water streams. When you do find them, you
should be prepared to imitate them.
Copyright 2009 James Marsh
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