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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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 Callibaetis (Speckled Dun) Mayfly Spinner Pictures

Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming
Lateral view of a Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming
Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming
Dorsal view of a Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming
Ventral view of a Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming
Each length mark is 1/16 inch.

Ruler view of a Male Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Firehole River in Wyoming The smallest ruler marks are 1/16".

This mayfly was collected from the Firehole River in Wyoming on August 11th, 2018 and added to Troutnut.com by Troutnut on June 12th, 2019.


Start a Discussion of Spinner

Male Callibaetis (Speckled Dun) Mayfly Spinner Pictures

Collection details
Location: Firehole River, Wyoming
Date: August 11th, 2018
Added to site: June 12th, 2019
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy