Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Stream photos

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

Female Hydropsyche (Spotted Sedge) Caddisfly Adult Female Hydropsyche (Spotted Sedge) Caddisfly Adult

Lateral view of a Female Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Columbia River in Washington

7 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.

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.