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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.

Neversink Gorge (Wolf Brook) in New York

Stream photos

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Coleoptera (Beetle) Insect LarvaColeoptera (Beetle) Insect Larva
Lateral view of a Coleoptera (Beetle) Insect Larva from Sears Creek in Washington
6 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.
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  2. Idaho
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  3. The Henry's Fork of the Snake River

  1. Trout Streams
    2. ›
  2. Idaho
    3. ›
  3. The Henry's Fork of the Snake River

Landscape & scenery photos from the Henry's Fork of the Snake River

The Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
Mesa Falls From the Henry's Fork of the Snake River in Idaho
Harriman Ranch on the Henry's Fork From the Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho
Lower end of the storried Harriman Ranch section of the Henry's From the Henry's Fork of the Snake River in Idaho
Upper Mesa Falls on the Henry's Fork of the Snake River From the Henry's Fork of the Snake River in Idaho
The Henry's Fork of the Snake River in Idaho

Closeup insects by Troutnut from the Henry's Fork of the Snake River in Idaho

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Male Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner
Lateral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Ephemerella excrucians (Pale Morning Dun) Mayfly Dun
Lateral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Dun from the Henry's Fork of the Snake River in Idaho
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Male Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner
Lateral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Female Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner
Lateral view of a Female Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from Red Rock Creek in Idaho
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Male Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner
Lateral view of a Male Acerpenna pygmaea (Baetidae) (Tiny Blue-Winged Olive) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Leptoceridae Caddisfly Adult
Lateral view of a Leptoceridae Caddisfly Adult from the Henry's Fork of the Snake River in Idaho
This specimen keyed easily to Leptoceridae, but I hit a bit of a dead end in the genus key, because I can't seem to find the cross-veins in the wings that are supposed to help narrow it down. I took pictures of all the relevant features under the microscope; maybe somebody with more experience with the family can help.
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Female Siphlonurus occidentalis (Gray Drake) Mayfly Spinner
Lateral view of a Female Siphlonurus occidentalis (Siphlonuridae) (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Hydropsyche (Spotted Sedge) Caddisfly Adult
Lateral view of a Male Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Henry's Fork of the Snake River in Idaho
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Male Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner
Lateral view of a Male Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Female Drunella grandis (Western Green Drake) Mayfly Dun
Lateral view of a Female Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Dun from the Henry's Fork of the Snake River in Idaho
I didn't find a male spinner to associate with this one; I'm tentatively calling it grandis based on size alone. I found it floating down the surface of the Henry's Fork (the only one I saw that day, weeks after the hatch probably peaked) crippled by what appears to be a mass of eggs sticking out of its abdomen.
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Female Callibaetis ferrugineus (Speckled Dun) Mayfly Spinner
Female Callibaetis ferrugineus (Baetidae) (Speckled Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Epeorus albertae (Pink Lady) Mayfly Spinner
Lateral view of a Male Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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