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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.

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.

Stenonema (March Browns and Cahills) Mayfly Nymph Pictures

Dorsal view of a Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Nymph from the Namekagon River in Wisconsin
Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Nymph from the Namekagon River in Wisconsin
Ventral view of a Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Nymph from the Namekagon River in Wisconsin
Ruler view of a Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Nymph from the Namekagon River in Wisconsin The smallest ruler marks are 1 mm.

This mayfly was collected from the Namekagon River in Wisconsin on June 8th, 2021 and added to Troutnut.com by Troutnut on June 9th, 2021.


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Stenonema (March Browns and Cahills) Mayfly Nymph Pictures

Collection details
Location: Namekagon River, Wisconsin
Date: June 8th, 2021
Added to site: June 9th, 2021
Author: Troutnut
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