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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.

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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 Isonychia bicolor (Mahogany Dun) Mayfly Dun Pictures

I thought this dun was worth photographing, even though she's in pretty bad shape, because she shows something I haven't seen in Isonychia elsewhere. The bright stripe down the back which is normally present only in the nymph carried over to the dun in this one.

Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania
Lateral view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania
Dorsal view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania
Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania
Ruler view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania The smallest ruler marks are 1 mm.
Ventral view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from Penn's Creek in Pennsylvania

This mayfly was collected from Penn's Creek in Pennsylvania on May 26th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.


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Female Isonychia bicolor (Mahogany Dun) Mayfly Dun Pictures

Collection details
Location: Penn's Creek, Pennsylvania
Date: May 26th, 2007
Added to site: June 4th, 2007
Author: Troutnut
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