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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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

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.

10 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.

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.

Trealtor Creek

I collected some bugs while camped near this tiny, tiny creek. It's too small for pretty much anyone to bother fishing.

Closeup insects by Troutnut from Trealtor Creek in Idaho

Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Adult

11 Pictures

Lateral view of a Onocosmoecus unicolor (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Adult from Trealtor Creek in Idaho

One key characteristic not clearly photographed, but clear in under the microscope: this specimen's midtibiae have 2 apical spurs and 1 preapical spur.

Collected August 3, 2020 from Trealtor Creek in Idaho

Added by Troutnut on August 20, 2020

Collected August 3, 2020 from Trealtor Creek in Idaho and added by Troutnut on August 20, 2020

Male Neoleptophlebia heteronea (Blue Quill) Mayfly Spinner

10 Pictures

Lateral view of a Male Neoleptophlebia heteronea (Leptophlebiidae) (Blue Quill) Mayfly Spinner from Trealtor Creek in Idaho

Collected August 3, 2020 from Trealtor Creek in Idaho

Added by Troutnut on August 20, 2020

Collected August 3, 2020 from Trealtor Creek in Idaho and added by Troutnut on August 20, 2020

SalmonfliesPteronarcys californica

Trout Streams › Idaho › Trealtor Creek