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.

The Clark's Fork of the Yellowstone River in Wyoming

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.

identification needed

Rhithrogena impersonata (Dark Red Quill) Mayfly Nymph

6 Pictures

Dorsal view of a Rhithrogena impersonata (Heptageniidae) (Dark Red Quill) Mayfly Nymph from Mongaup Creek in New York

This was the only Rhithrogena specimen in a large sample of nymphs from a small Catskill stream. It looks virtually identical to Rhithrogena impersonata specimens collected in the Midwest, but I didn't get to check the distinguishing features under a microscope.

Collected April 18, 2006 from Mongaup Creek in New York

Added by Troutnut on April 21, 2006

Collected April 18, 2006 from Mongaup Creek in New York and added by Troutnut on April 21, 2006

Kinza
Posts: 1

Kinza on Feb 4, 2017February 4th, 2017, 3:31 am EST

Can you please identify the genus of Family Heptagenedae if I send you images?

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Feb 4, 2017February 4th, 2017, 4:17 am EST

Kinza-

Possibly, if the photos are good and show distinguishing characteristics.

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Crepuscular

Boiling Springs, PA

Posts: 920

Crepuscular on Feb 6, 2017February 6th, 2017, 3:06 am EST

Are you sending adult or immature specimen photos?
General location is somewhat helpful as well. I'm assuming North America here, so NW, SW,MW,NE,SE.

If you are sending photos of the nymphs, the following is helpful (necessary for a confident identification):

1.a good ventral photo of the abdomen
2. A good dorsal photo of the abdomen with gills plainly visible
3.A good photo of the terminal abdominal segment with caudal filaments visible
4.A good Dorsal photo of the head
5.Fairly detailed photos of gills on segments 1-6.