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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 Onocosmoecus (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
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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Pteronarcys californica (Giant Salmonfly) Stonefly Nymph Pictures

Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Lateral view of a Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Dorsal view of a Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Ventral view of a Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana
Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Nymph from the Gallatin River in Montana

This stonefly was collected from the Gallatin River in Montana on July 2nd, 2019 and added to Troutnut.com by Troutnut on July 18th, 2019.


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Pteronarcys californica (Giant Salmonfly) Stonefly Nymph Pictures

Collection details
Location: Gallatin River, Montana
Date: July 2nd, 2019
Added to site: July 18th, 2019
Author: Troutnut
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