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.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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.

Female Cinygmula (Dark Red Quill) Mayfly Dun Pictures

I'm calling this one Cinygmula just based on the general look and the fact that the genus is very common in this river. Official keys can't rule out other Heptageniidae, though.

Lateral view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Ruler view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".
Ventral view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun 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 July 3rd, 2018.


Start a Discussion of Dun

Female Cinygmula (Dark Red Quill) Mayfly Dun Pictures

Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: July 3rd, 2018
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy