Header image
Enter a name
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.

Neversink Gorge (Wolf Brook) in New York

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)
Limnephilus (Summer Flier Sedge) Caddisfly LarvaLimnephilus (Summer Flier Sedge) Caddisfly Larva
Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington
24 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.

Male Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner Pictures

Ruler view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho The smallest ruler marks are 1 mm.
Lateral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Ventral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho

This mayfly was collected from the Henry's Fork of the Snake River in Idaho on August 1st, 2020 and added to Troutnut.com by Troutnut on August 18th, 2020.


Start a Discussion of Spinner

Male Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner Pictures

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Ephemeroptera (Mayflies)
  5. » Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
  6. » Genus Ephemerella (Hendricksons, Sulphurs, PMDs)
  7. » Species excrucians (Pale Morning Duns)
Collection details
Location: Henry's Fork of the Snake River, Idaho
Date: August 1st, 2020
Added to site: August 18th, 2020
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy