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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.

Female Psychoglypha alascensis (Snow Sedge) Caddisfly Adult Pictures

This specimen was 22 mm.

This caddisfly was collected from Mystery Creek #178 in Idaho on September 15th, 2013 and added to Troutnut.com by Entoman on September 23rd, 2013.

Discussions of this Adult

Snow Sedge
14 replies
Posted by Entoman on Sep 23, 2013
Last reply on Sep 26, 2013 by Crepuscular
There were enough of these flitting around in the evening to keep the fish looking up. Anglers can easily confuse these with Dicosmoecus species (October Caddis) at this time of year, but their wings are quite different and they like gentler flows.

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Female Psychoglypha alascensis (Snow Sedge) Caddisfly Adult Pictures

Collection details
Location: Mystery Creek #178, Idaho
Date: September 15th, 2013
Added to site: September 23rd, 2013
Author: Entoman
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