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Updates from August 3, 2020

Photos by Troutnut from Star Hope Creek, the East Fork Big Lost River, and the North Fork Big Lost River in Idaho

 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
Kind of pretty for a stocker. From the East Fork Big Lost River in Idaho.
Kind of pretty for a stocker.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
This was my first Snake River Fine-Spotted Cutthroat. It's probably a stocker, and no trout are native to this river drainage (which disappeared into aquifers in the desert, even before irrigation took the water), but it's still fun to add another subspecies to my list. From the East Fork Big Lost River in Idaho.
This was my first Snake River Fine-Spotted Cutthroat. It's probably a stocker, and no trout are native to this river drainage (which disappeared into aquifers in the desert, even before irrigation took the water), but it's still fun to add another subspecies to my list.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the North Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From Star Hope Creek in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 19, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the East Fork Big Lost River in Idaho.
StateIdaho
Date TakenAug 3, 2020
Date AddedAug 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1

Closeup insects by Troutnut from the East Fork Big Lost River and Star Hope Creek in Idaho

Female Ephemerella tibialis (Little Western Dark Hendrickson) Mayfly DunFemale Ephemerella tibialis (Little Western Dark Hendrickson) Mayfly Dun View 6 PicturesI'm fairly confident calling this dun Ephemerella tibialis because it emerged from one of several similar nymphs in my bucket, which I was able to ID with quite a bit of certainty. However, it looks very different from the other duns I currently have listed, which makes me rethink their IDs.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 18, 2020
Dolophilodes (Medium Evening Sedges) Caddisfly LarvaDolophilodes (Medium Evening Sedges) Caddisfly Larva View 9 PicturesI think this larva best fits Dolophilodes, in which the anterior (Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of.") margin of the frontoclypeus is supposed to be "slightly asymmetrical." I can't confidently make out the asymmetry, but the other genera are supposed to have either greater asymmetry or a symmetrical, but convex, shape, whereas this one is clearly concave.

Based on distribution records, the species should be either aequalis, dorcus, or pallidipes, but I can't find any source to distinguish between them.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020
Hesperoperla pacifica (Golden Stone) Stonefly NymphHesperoperla pacifica (Golden Stone) Stonefly Nymph View 9 PicturesID notes from the microscope: The occiput (Occiput: The back of the head.) has a sinuate, irregularly spaced spinule row.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020
Baetis flavistriga (BWO) Mayfly NymphBaetis flavistriga (BWO) Mayfly Nymph View 5 PicturesThis specimen keys to the Baetis flavistriga complex, which could be either flavistriga or Baetis phoebus.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020
Arctopsyche grandis (Great Gray Spotted Sedge) Caddisfly LarvaArctopsyche grandis (Great Gray Spotted Sedge) Caddisfly Larva View 14 PicturesAt first I had trouble believing this giant Hydropsychidae larva was actually a member of its family, because of the size. I had never seen such a thing. It turned out to be a member of this exceptionally large species with a fitting name, grandis.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020
Attenella margarita (Little Western Blue-Winged Olive) Mayfly NymphAttenella margarita (Little Western Blue-Winged Olive) Mayfly Nymph View 7 PicturesNotes from the microscope on the ID: Maxillary palp (
The palp on the maxilla of an Ephemerella nymph (detached and photographed under a microscope) is highlighted in red here.
The palp on the maxilla of an Ephemerella nymph (detached and photographed under a microscope) is highlighted in red here.
Palp: A long, thin, often segmented appendage which can protrude from certain insect mouth parts such as the maxillae. Also known as the < />palpus.
)
is present, distinctly 2-segmented, but very small. Gills on segment 4-7. This specimen has some unfortunate damage to the abdomen, but it's the only one I found in my sample.
Collected August 3, 2020 from the East Fork Big Lost River in Idaho
Added to Troutnut.com by Troutnut on August 19, 2020

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