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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

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 Drunella spinifera (Western Slate Olive Dun) Mayfly Nymph Pictures

In a bucket full of Drunella coloradensis nymphs, this was the only specimen of Drunella spinifera (and the first one I've found anywhere).

Dorsal view of a Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Ventral view of a Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Lateral view of a Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Artistic view of a Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington
Ruler view of a Male Drunella spinifera (Ephemerellidae) (Western Slate Olive Dun) Mayfly Nymph from Mystery Creek #199 in Washington The smallest ruler marks are 1 mm.

This mayfly was collected from Mystery Creek #199 in Washington on July 28th, 2019 and added to Troutnut.com by Troutnut on July 30th, 2019.

Discussions of this Nymph

Another horned critter
Posted by Martinlf on Aug 17, 2020
Last reply on Aug 17, 2020 by Martinlf
Woah! Another cool drunella. So much out there we often don't have a clue about. Thanks, Jason.

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Male Drunella spinifera (Western Slate Olive Dun) Mayfly Nymph Pictures

Collection details
Location: Mystery Creek #199, Washington
Date: July 28th, 2019
Added to site: July 30th, 2019
Author: Troutnut
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