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Updates from August 1, 2020



Photos by Troutnut from Mystery Creek #237 and the Henry's Fork of the Snake River in Montana and Idaho

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My longest brook trout yet, 16 1/8". From Mystery Creek # 237 in Montana.
My longest brook trout yet, 16 1/8".
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From the Henry's Fork of the Snake River in Idaho.
StateIdaho
LocationHenry's Fork of the Snake River
Date TakenAug 1, 2020
Date AddedAug 17, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From the Henry's Fork of the Snake River in Idaho.
StateIdaho
LocationHenry's Fork of the Snake River
Date TakenAug 1, 2020
Date AddedAug 17, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From the Henry's Fork of the Snake River in Idaho.
StateIdaho
LocationHenry's Fork of the Snake River
Date TakenAug 1, 2020
Date AddedAug 17, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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This brook trout measured a bit over 14". From Mystery Creek # 237 in Montana.
This brook trout measured a bit over 14".
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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The only mountain whitefish of the trip. I caught it nymphing the bottom of a pool so deep I could tell there were fish but couldn't tell what kind. They were whitefish. From Mystery Creek # 237 in Montana.
The only mountain whitefish of the trip. I caught it nymphing the bottom of a pool so deep I could tell there were fish but couldn't tell what kind. They were whitefish.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
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From Mystery Creek # 237 in Montana.
StateMontana
Date TakenAug 1, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1

Closeup insects by Troutnut from the Henry's Fork of the Snake River and Mystery Creek #237 in Idaho and Montana

Male Ephemerella excrucians (Pale Morning Dun) Mayfly SpinnerMale Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner View 4 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Female Hesperoperla pacifica (Golden Stone) Stonefly AdultFemale Hesperoperla pacifica (Golden Stone) Stonefly Adult View 12 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 17, 2020
Male Cinygmula reticulata (Western Ginger Quill) Mayfly SpinnerMale Cinygmula reticulata (Western Ginger Quill) Mayfly Spinner View 7 PicturesThe lengths of the wing and body, measured with a caliper, are both 8 mm.

Keys in Needham's 1935 Biology of Mayflies point to either Cinygmula reticulata or Cinygmula gartrelli. IT seems to have “cross veins in costal half of fore wing only, slightly margined with brown” and “wings tinged withamber at base and along costal margin of both wings” (gartrelli) as opposed to “all cross veins of both wings faintly but broadly margined with pale smoky” and “wings entirely amber-tinged” (although there is a slight amber tinge throughout, just more pronounced in places) as in reticulata. However, wing length reported for reticulata (9 mm) is closer to this specimen than gartrelli (10 mm). Ventral (Ventral: Toward or on the bottom.) median marks are supposed to be “traces” for reticulata and “present” for gartrelli. Descriptions for both species involve semi-hyaline (Hyaline: Highly transparent, or glassy; usually refers to insect wings, especially those of mayfly spinners.) anterior (Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of.") abdominal segments not present on my specimens. Distribution records suggest reticulate lives nearby, so I'm going with that, but I can't confidently rule out gartrelli.
Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020
Female Ephemerella excrucians (Pale Morning Dun) Mayfly SpinnerFemale Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner View 7 Pictures
Collected August 1, 2020 from the Red Rock Creek in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Male Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly SpinnerMale Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner View 8 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly SpinnerFemale Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Spinner View 7 Pictures
Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020
Female Suwallia pallidula (Sallfly) Stonefly AdultFemale Suwallia pallidula (Sallfly) Stonefly Adult View 12 PicturesA large number of photos from the microscope allowed a fairly confident ID on this one, which not coincidentally matches very well a previous specimen of Suwallia pallidula that I collected in Washington.
Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020
Female Drunella grandis (Western Green Drake) Mayfly DunFemale Drunella grandis (Western Green Drake) Mayfly Dun View 7 PicturesI 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.
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly SpinnerFemale Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Spinner View 6 Pictures
Collected August 1, 2020 from Mystery Creek #237 in Montana
Added to Troutnut.com by Troutnut on August 18, 2020
Female Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly SpinnerFemale Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Spinner View 3 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Male Epeorus albertae (Pink Lady) Mayfly SpinnerMale Epeorus albertae (Pink Lady) Mayfly Spinner View 8 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Female Callibaetis ferrugineus (Speckled Spinner) Mayfly SpinnerFemale Callibaetis ferrugineus (Speckled Spinner) Mayfly Spinner View 5 Pictures
Collected August 1, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
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