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.

Stream photos

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Psychodidae True Fly Larva Psychodidae True Fly Larva

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.

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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 Pictetiella expansa (Autumn Springfly) Stonefly Adult Pictures

Based on photos, this specimen seems to key out (using Merritt & Cummins 4th Edition) to Pictetiella expansa, but some of the characteristics aren't 100 % clear. Frisonia picticeps is another possibility. The range map doesn't show Pictetiella expansa in Washington, but that species is listed elsewhere as occurring near Puget Sound, and the head markings are similar to (albeit not a perfect match for) those of a male from Colorado in the scientific literature.

Lateral view of a Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington

Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington

Ventral view of a Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington

Ruler view of a Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".

Dorsal view of a Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington

This stonefly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on July 3rd, 2018.

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