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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.

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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.

Drunella coloradensis (Small Western Green Drake) Mayfly Nymph Pictures

Drunella flavilinea

Dorsal view of a Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho
Ventral view of a Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho
Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho
Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho
Note this nymph is a lot larger than the size 18 hook in the picture, at least a 16 or perhaps 14. It was just squirming around too much to photograph next to the correct hook size.

Ruler view of a Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho The smallest ruler marks are 1 mm.
This group of nymphs doesn't include the other one photographed here, but I included it to illustrate the variety of colors found in this species in the same river.

Drunella coloradensis (Ephemerellidae) (Small Western Green Drake) Mayfly Nymph from Green Lake Outlet in Idaho

This mayfly was collected from Green Lake Outlet in Idaho on August 4th, 2020 and added to Troutnut.com by Troutnut on August 20th, 2020.


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Drunella coloradensis (Small Western Green Drake) Mayfly Nymph Pictures

Collection details
Location: Green Lake Outlet, Idaho
Date: August 4th, 2020
Added to site: August 20th, 2020
Author: Troutnut
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