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.

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

11 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.

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

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

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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