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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 Theliopsyche (Little Brown Sedge) Caddisfly Adult Pictures

This one has a neat iridescent sheen to its wings.

See the discussion for details on this fly's tentative ID.

Ruler view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania The smallest ruler marks are 1 mm.
Dorsal view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Ventral view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Lateral view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania
Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

This caddisfly was collected from Mystery Creek #42 in Pennsylvania on May 28th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

Discussions of this Adult

Chimarra
11 replies
Posted by Taxon on Jun 5, 2007
Last reply on Dec 31, 2007 by Taxon
Jason-

That would be Chimarra, most likely C. aterrima, but it could also be either C. obscura or C. socia. Based on that neat black egg mass visible in the ventral view photo, it would also appear that it's a female.

Start a Discussion of Adult

Female Theliopsyche (Little Brown Sedge) Caddisfly Adult Pictures

Collection details
Location: Mystery Creek #42, Pennsylvania
Date: May 28th, 2007
Added to site: June 4th, 2007
Author: Troutnut
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