Header image
Enter a name
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.

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.

Cinygmula (Dark Red Quill) Mayfly Nymph Pictures

Unfortunately there's no good key to species of Cinygmula nymphs and I didn't find an adult, so this one will have to stay at genus level.

Dorsal view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Ruler view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington The smallest ruler marks are 1 mm.
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Ventral view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington

This mayfly was collected from the Dosewallips River in Washington on July 6th, 2020 and added to Troutnut.com by Troutnut on July 12th, 2020.


Start a Discussion of Nymph

Cinygmula (Dark Red Quill) Mayfly Nymph Pictures

Collection details
Location: Dosewallips River, Washington
Date: July 6th, 2020
Added to site: July 12th, 2020
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy