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This topic is about the Mayfly Species Isonychia bicolor

This is by far the most important species of Isonychia. Many angling books once split its credit with the species Isonychia sadleri and Isonychia harperi, but entomologists have since discovered that those are just variations of this abundant species.

See the main Isonychia page for more about these intriguing mayflies. Read more...

Isonychia bicolor (Mahogany Dun) Mayfly Nymph Isonychia bicolor (Mahogany Dun) Mayfly Nymph (7 Pictures)
Female Isonychia bicolor (Mahogany Dun) Mayfly Dun Female Isonychia bicolor (Mahogany Dun) Mayfly Dun (13 Pictures)
Male Isonychia bicolor (Mahogany Dun) Mayfly Spinner Male Isonychia bicolor (Mahogany Dun) Mayfly Spinner (15 Pictures)

There are 16 more specimens...

The Discussion

Post Reply
JMVSeptember 21st, 2006, 3:07 pm
Posts: 1Great site, I'm an Iso. fanatic... JM
TroutnutSeptember 21st, 2006, 4:25 pm
Administrator
Bellevue, WA

Posts: 2737		Me too! They're one of my favorite mayflies.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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