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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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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.

Alvin has attached this picture to aid in identification. The message is below.
Alvin
Posts: 1
Alvin on Apr 7, 2012April 7th, 2012, 9:56 am EDT
please tell me what is this
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Apr 7, 2012April 7th, 2012, 10:37 am EDT
Hi Alvin,

Welcome to the forum!

The top critter is a scud of some type.

The other one is a Chaoborus sp. larva of the family Chaoboridae. They are commonly called Glassworms in the larval stage and Phantom Midges as adults. These are aquatic critters of the Diptera order and great consumers of mosquito larvae. Did you find this in trout water?
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Crepuscular
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Apr 7, 2012April 7th, 2012, 10:50 am EDT
I'd be really surprised if this came from moving water. I usually find them in lentic habitats.

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