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.

Cedar sweepers line the fertile spring creek headwaters of a famous trout stream.

From the Bois Brule River in Wisconsin

Stream photos

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Onocosmoecus (Great Late-Summer Sedge) Caddisfly Larva Onocosmoecus (Great Late-Summer Sedge) Caddisfly Larva

Lateral view of a Onocosmoecus (Limnephilidae) (Great Late-Summer Sedge) Caddisfly Larva from the Yakima River in Washington

This specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.

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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.

Site updates from July 9, 2011

Closeup insects by Bnewell from the Touchet River in Washington

Female Rhithrogena Mayfly Spinner

1 Picture

Female Rhithrogena (Heptageniidae) Mayfly Spinner from the Touchet River in Washington

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 10, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 10, 2011

Sweltsa fidelis (Sallfly) Stonefly Adult

1 Picture

Sweltsa fidelis (Chloroperlidae) (Sallfly) Stonefly Adult from the Touchet River in Washington

Another yellow stonefly from Touchet Corral.

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 9, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 9, 2011

Alloperla severa (Sallfly) Stonefly Adult

1 Picture

Alloperla severa (Chloroperlidae) (Sallfly) Stonefly Adult from the Touchet River in Washington

At Touchet Corral.

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 9, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 9, 2011

Comments / replies

Waxsmith
CANADA

Posts: 6

Waxsmith on Jul 13, 2011July 13th, 2011, 7:24 am EDT

Most of the pictures on this site are great, however, in some cases, for instance in the case of the mayfly types it would be so great if there was some indication of average size of the depicted specimen.Mayflies in their enormous array of sizes are hard to distinguish because colour alone often will not do it.
Thanks, A.K.

What is this supposed to look like, example please.