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.

My then-girlfriend, now-wife took this picture with my camera.

From Toughannock Creek in New York

Stream photos

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Kogotus Stonefly Nymph Kogotus Stonefly Nymph

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington

This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.

8 Recently Added Photos

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.

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Hesperoperla pacifica (Golden Stone) Stonefly Nymph Pictures

Ruler view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1 mm.

Dorsal view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the South Fork Snoqualmie River in Washington

Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the South Fork Snoqualmie River in Washington

Ventral view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the South Fork Snoqualmie River in Washington

This stonefly was collected from the South Fork Snoqualmie River in Washington on March 19th, 2019 and added to Troutnut.com by Troutnut on June 14th, 2019.

Discussions of this Nymph

Hesperoperla pacifica

Posted by Millcreek on Jul 19, 2019

Last reply on Jul 19, 2019 by Millcreek

Most likely Hesperoperla pacifica. Examples can be seen here.
https://bugguide.net/node/view/196000/bgimage

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