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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

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 Stenonema modestum (Cream Cahill) Mayfly Spinner Pictures

Although I couldn't key out this female spinner, I'm fairly comfortable calling her Stenonema modestum based on the markings on the abdomen and their similarity to those on the males of this species. This one probably came from the Namekagon River, although there's a possibility it came from the West Fork of the Chippewa River, because it was found in the truck after fishing those streams on back-to-back days.

Lateral view of a Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin
Dorsal view of a Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin
Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin
Ruler view of a Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin The smallest ruler marks are 1 mm.
Ventral view of a Female Stenonema modestum (Heptageniidae) (Cream Cahill) Mayfly Spinner from the Namekagon River in Wisconsin

This mayfly was collected from the Namekagon River in Wisconsin on June 22nd, 2021 and added to Troutnut.com by Troutnut on June 24th, 2021.


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Female Stenonema modestum (Cream Cahill) Mayfly Spinner Pictures

Collection details
Location: Namekagon River, Wisconsin
Date: June 22nd, 2021
Added to site: June 24th, 2021
Author: Troutnut
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