The March Brown is also called
the Western March Brown. They
are clingers that are the first
large mayfly to hatch in the West.
The morrisoni species is the first
to hatch, followed by the hageni
usually within a few weeks. There
is also a undulata species that
hatches from late summer to early
fall.
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Nymph
Spinner
Emerger with
Trailing Shuck
Emerger
Dun
Mayflies: March Brown
March Brown (Imitations)
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Copyright 2013 James Marsh
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Image of a March Brown
Spinner
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