Header image
Enter a name
Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Mystery Creek # 256 in Idaho

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)
Tricorythodes (Trico) Mayfly NymphTricorythodes (Trico) Mayfly Nymph
Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 in Washington
9 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 Rhithrogena virilis Mayfly Spinner Pictures

I'm guessing this is Rhithrogena virilis based on resemblance to a similar specimen collected last year.

Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Lateral view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Ruler view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".
Artistic view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on June 23rd, 2018.


Start a Discussion of Spinner

Male Rhithrogena virilis Mayfly Spinner Pictures

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Ephemeroptera (Mayflies)
  5. » Family Heptageniidae (March Browns, Cahills, Quill Gordons)
  6. » Genus Rhithrogena
  7. » Species virilis
Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: June 23rd, 2018
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy