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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...

There are 16 more specimens...

The Discussion

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: 2458
Me too! They're one of my favorite mayflies.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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