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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 Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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.

By Troutnut on August 3rd, 2020
Continuing my exploration of some remote parts of central Idaho, I hiked into a little alpine lake called Green Lake above the Copper Basin and caught a 5-inch rainbow. There seems to be a naturally reproducing population of tiny rainbows there (I saw fry), but I saw no sign of big ones. Back at the trailhead, I collected some interesting bugs at the lake outlet.

Then I drove north quite a ways, touring some very remote roads. I collected some bugs from tiny creeks along the way, without stopping to fish.

Photos by Troutnut from Green Lake Outlet, Green Lake, and Squaw Creek in Idaho

Green Lake Outlet in Idaho
Green Lake Outlet in Idaho
Green Lake Outlet in Idaho
Green Lake in Idaho
Green Lake in Idaho
Green Lake in Idaho
Green Lake in Idaho
Green Lake in Idaho
Squaw Creek in Idaho

Closeup insects by Troutnut from Trealtor Creek and Green Lake Outlet in Idaho

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Ameletus (Brown Dun) Mayfly Nymph
Dorsal view of a Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Green Lake Outlet in Idaho
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Baetis bicaudatus (BWO) Mayfly Nymph
The J-shaped light mark on the first femur and L-shaped marks on the next two are telltale signs of Baetis bicaudatus according to the original species description.

Dorsal view of a Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Green Lake Outlet in Idaho

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