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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.

Slough Creek in Wyoming

Stream photos

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Female Hydropsyche (Spotted Sedge) Caddisfly AdultFemale Hydropsyche (Spotted Sedge) Caddisfly Adult
Lateral view of a Female Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Columbia River in Washington
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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 grandis (Western Green Drake) Mayfly Nymph Pictures

Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Dorsal view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Ruler view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington The smallest ruler marks are 1 mm.
Ventral view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Dosewallips River in Washington
Lateral view of a Drunella grandis (Ephemerellidae) (Western Green Drake) 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.

Discussions of this Nymph

Fearsome
1 replies
Posted by Martinlf on Aug 14, 2020
Last reply on Aug 14, 2020 by Troutnut
Love the detail here, Jason. Those spikes on the head and abdomen are cool. Horned mayfly.
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Drunella grandis (Western Green Drake) Mayfly Nymph Pictures

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Ephemeroptera (Mayflies)
  5. » Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)
  6. » Genus Drunella (Blue-Winged Olives)
  7. » Species grandis (Western Green Drakes)
Collection details
Location: Dosewallips River, Washington
Date: July 6th, 2020
Added to site: July 12th, 2020
Author: Troutnut
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