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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.

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.

Trout Stream Insects, Page 5

Trout Stream Insects, Page 5

Visit the Trout Stream Insects section for thousands of closeups of mayflies, stoneflies, caddisflies, and others, along with detailed information about their life cycles and relevance to angling. This section showcases a few favorites.

Artistic view of a Male Hexagenia atrocaudata (Ephemeridae) (Late Hex) Mayfly Spinner from the Namekagon River in Wisconsin
Lateral view of a Male Afghanurus inconspicua (Heptageniidae) Mayfly Dun from the East Branch of the Delaware River in New York
Artistic view of a Female Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Spinner from the Bois Brule River in Wisconsin
Artistic view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hexagenia limbata (Ephemeridae) (Hex) Mayfly Nymph from the Namekagon River in Wisconsin
Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
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