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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Isonychia bicolor (Mahogany Dun) Mayfly Nymph Pictures

Video Clip

Isonychia nymph swimming around

These nymphs may be the best swimmers of all North American mayflies.

This mayfly was collected from the Namekagon River in Wisconsin on January 19th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.


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Isonychia bicolor (Mahogany Dun) Mayfly Nymph Pictures

Collection details
Location: Namekagon River, Wisconsin
Date: January 19th, 2004
Added to site: January 25th, 2006
Author: Troutnut
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