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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.

Mystery Creek # 256 in Idaho

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Kogotus Stonefly Nymph Kogotus Stonefly Nymph

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington

This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.

8 Recently Added Photos

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.

Updates from June 7, 2005

Updates from June 7, 2005

Closeup insects by Troutnut and Bnewell from the Namekagon River and the Vermillion River in Wisconsin and Montana

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Hexagenia limbata (Hex) Mayfly Nymph

Hexagenia limbata (Ephemeridae) (Hex) Mayfly Nymph from the Namekagon River in Wisconsin

7
Male Neoleptophlebia mollis (Jenny Spinner) Mayfly Dun

Lateral view of a Male Neoleptophlebia mollis (Leptophlebiidae) (Jenny Spinner) Mayfly Dun from the Namekagon River in Wisconsin

4
Caenis (Angler's Curse) Mayfly Nymph

Dorsal view of a Caenis (Caenidae) (Angler's Curse) Mayfly Nymph from the Namekagon River in Wisconsin

5
Female Stenonema (March Browns and Cahills) Mayfly Dun

Lateral view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Dun from the Namekagon River in Wisconsin

4
Female Epeorus vitreus (Sulphur) Mayfly Dun

Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

3
Eurylophella (Chocolate Dun) Mayfly Nymph

Dorsal view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from the Namekagon River in Wisconsin

2
Siphlonurus alternatus (Gray Drake) Mayfly Nymph

Dorsal view of a Siphlonurus alternatus (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Namekagon River in Wisconsin

3
Male Attenella attenuata (Blue-Winged Olive) Mayfly Dun

Lateral view of a Male Attenella attenuata (Ephemerellidae) (Blue-Winged Olive) Mayfly Dun from the Namekagon River in Wisconsin

This specimen came from the same hatch as a female.

4
Female Attenella attenuata (Blue-Winged Olive) Mayfly Dun

Lateral view of a Female Attenella attenuata (Ephemerellidae) (Blue-Winged Olive) Mayfly Dun from the Namekagon River in Wisconsin

This specimen came from the same hatch as a male.

2
Stenonema mediopunctatum (Cream Cahill) Mayfly Nymph

Dorsal view of a Stenonema mediopunctatum (Heptageniidae) (Cream Cahill) Mayfly Nymph from the Namekagon River in Wisconsin

4
Stenonema mediopunctatum (Cream Cahill) Mayfly Nymph

Dorsal view of a Stenonema mediopunctatum (Heptageniidae) (Cream Cahill) Mayfly Nymph from the Namekagon River in Wisconsin

3
Baetisca laurentina (Armored Mayfly) Mayfly Nymph

Dorsal view of a Baetisca laurentina (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Namekagon River in Wisconsin

5
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph

There are postero-lateral projections on adominal segments 4-9.

Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Namekagon River in Wisconsin

I took quite a few notes at the microscope when I collected this specimen. They're attached to the appropriate pictures. I found this specimen in the same collection as a similar one. Since I only have strange views of this one, it's possible that they're actually the same specimen and I somehow confused my picture-ordering and got the impression that they're different nymphs.

3
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph

Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Namekagon River in Wisconsin

2
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph

Ventral view of a Ephemerella (Ephemerellidae) (Hendricksons, Sulphurs, PMDs) Mayfly Nymph from the Namekagon River in Wisconsin

I found this specimen in the same collection as a similar one. Since I only have strange views of this one, it's possible that they're actually the same specimen and I somehow confused my picture-ordering and got the impression that they're different nymphs.

1
Alloperla (Sallfly) Stonefly Nymph

Alloperla (Chloroperlidae) (Sallfly) Stonefly Nymph from the Vermillion River in Montana

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