Gray Drake Mayfly

These are species of the Siphlonurus genus of the Siphlonuridae family of
mayflies. They are found in rivers with slower moving water that usually has aquatic
vegetation. We categorized the
alternatus, occidententalis, columbianus, and
spectabilis species together, as they are almost identical.

The particular species should make no difference in the manner in which you
imitate these mayflies. It makes no difference in the appearance of the fly. One
nymph and one spinner fly pattern works for all the species.

Since the nymphs crawl out of the water to hatch. It's not necessary to imitate the
dun. It would get into the water only by accident.

The spinners are very important. We will cover the details of fishing the nymphs
and spinner fall stages of life in the linked articles.

These mayflies are found throughout the nation from the west coast to the east
coast and in Canada.
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