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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

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.

Male Stenonema vicarium (March Brown) Mayfly Spinner Pictures

Lateral view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Ruler view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin The smallest ruler marks are 1 mm.
Artistic view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Ventral view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Artistic view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin
Dorsal view of a Male Stenonema vicarium (Heptageniidae) (March Brown) Mayfly Spinner from the Teal River in Wisconsin

This mayfly was collected from the Teal River in Wisconsin on June 10th, 2021 and added to Troutnut.com by Troutnut on June 11th, 2021.


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Male Stenonema vicarium (March Brown) Mayfly Spinner Pictures

Collection details
Location: Teal River, Wisconsin
Date: June 10th, 2021
Added to site: June 11th, 2021
Author: Troutnut
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