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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 Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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.

Arctopsyche grandis (Great Gray Spotted Sedge) Caddisfly Larva Pictures

At first I had trouble believing this giant Hydropsychidae larva was actually a member of its family, because of the size. I had never seen such a thing. It turned out to be a member of this exceptionally large species with a fitting name, grandis.

Ruler view of a Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho The smallest ruler marks are 1 mm.
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Lateral view of a Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Dorsal view of a Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho
Arctopsyche grandis (Hydropsychidae) (Great Gray Spotted Sedge) Caddisfly Larva from the East Fork Big Lost River in Idaho

This caddisfly was collected from the East Fork Big Lost River in Idaho on August 3rd, 2020 and added to Troutnut.com by Troutnut on August 19th, 2020.


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Arctopsyche grandis (Great Gray Spotted Sedge) Caddisfly Larva Pictures

Collection details
Location: East Fork Big Lost River, Idaho
Date: August 3rd, 2020
Added to site: August 19th, 2020
Author: Troutnut
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