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Landscape & scenery photos from the Yakima River

Page:12345
 From the Yakima River in Washington.
LocationYakima River
Date TakenJul 22, 2017
Date AddedJul 24, 2017
AuthorTroutnut
CameraCanon EOS 7D Mark II
Yakima River from WA highway 10 near Teanaway, with rafters floating down. From the Yakima River in Washington.
Yakima River from WA highway 10 near Teanaway, with rafters floating down.
LocationYakima River
Date TakenJul 22, 2017
Date AddedJul 24, 2017
AuthorTroutnut
CameraCanon EOS 7D Mark II
 From the Yakima River in Washington.
LocationYakima River
Date TakenSep 17, 2020
Date AddedSep 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the Yakima River in Washington.
LocationYakima River
Date TakenSep 17, 2020
Date AddedSep 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
 From the Yakima River in Washington.
LocationYakima River
Date TakenSep 17, 2020
Date AddedSep 18, 2020
AuthorTroutnut
CameraNIKON 1 AW1
Page:12345

Closeup insects from the Yakima River

Page:12
Brachycentrus (Grannoms) Caddisfly LarvaBrachycentrus (Grannoms) Caddisfly Larva View 16 PicturesThis species of Brachycentrus was extremely common in mid-September kick net samples in the Yakima canyon.
Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Male Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly AdultMale Onocosmoecus unicolor (Great Late-Summer Sedge) Caddisfly Adult View 15 PicturesI first just assumed this was Dicosmoecus based on anglers' conventional wisdom since it's a large orange "October caddis," but Creno set me straight. I should have keyed it out. After another look under the microscope, it lacks an anepisternal wart on the mesopleuron (Mesopleuron: The side of the insect mesothorax, and the part to which the fore wings are attached in mayflies.), which rules out Dicosmoecus. The midtibiae have 2 apical (Apical: Close to the apex; tip or end.) spurs and 1 pre-apical (Apical: Close to the apex; tip or end.) spur, and from there the color pattern of the wing points to Onocosmoecus. The location then narrows the species to unicolor.
Collected September 17, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Male Baetidae (Blue-Winged Olives) Mayfly DunMale Baetidae (Blue-Winged Olives) Mayfly Dun View 11 PicturesThis specimen emerged indoors from nymphs I had collected, then partly molted into a spinner but got stuck along the way. I've included a couple pictures showing some of the spinner colors. It got a bit waterlogged after emerging, so the wings aren't in perfect shape, but it still represents one of two Baetids that were emerging and drawing trout to rise on the Yakima. Based on body size and shape, it is most likely the same species as this nymph.
Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Female Plecoptera (Stoneflies) Stonefly AdultFemale Plecoptera (Stoneflies) Insect Adult View 9 PicturesI'm puzzled on the family ID on this one. Just going by the size, shape, and color, it looks like Chloroperlidae. However, the key in Merritt & Commins has me puzzled. the second anal vein of the forewing is does not appear to be forked, and the apical (Apical: Close to the apex; tip or end.) tmaxillary palpal segment is about 60 % of the length of the penultimate segment, which does not strike me as "greatly reduced." If we assume it's not Chloroperlidae and move beyond there in the key, we get to the position of the cubitoanal crossvein (Crossvein: Short cross-wise veins in an insect wing which connect the long longitudinal (length-wise) veins.) relative to the anal cell in the forewing -- touching it in this case, which would indicate Perlidae. But the size and relatively skinny, cylindrical body really don't seem to match Perlidae at all.

If we assume it actually is Chloroperlidae and advance to couplet 92 (at least in the 5th edition key), we end up with one feature (vein Cu2 well developed with several intercubital crossveins (Crossvein: Short cross-wise veins in an insect wing which connect the long longitudinal (length-wise) veins.) connecting Cu1 and Cu2) contradicting two others (posterolateral margins of head usually parallel behind eyes, and epicranial sutures prominent) in the first couplet.

I'm clearly missing something.
Collected September 17, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Male Baetidae (Blue-Winged Olives) Mayfly NymphMale Baetidae (Blue-Winged Olives) Mayfly Nymph View 10 PicturesAnother nymph probably of the same species as this one emerged and was photographed as a dun and partly-molted spinner.
Collected September 12, 2020 from the Yakima River in Washington
Added to Troutnut.com by Troutnut on September 19, 2020
Page:12

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