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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.

Dorsal view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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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Millcreek has attached these 6 pictures. The message is below.
March 28, 2014. Mature female nymph. Live specimen. 7 mm (excluding cerci).
March 28, 2014. Immature male nymph. Live specimen. 6 mm (excluding cerci).
March 28, 2014. Immature female nymph. Live specimen. 7 mm (excluding cerci).
February 15, 2014. Mature male nymph. 7 mm (excluding cerci). In alcohol.
February 15, 2014. Mature female nymph. 7 mm (excluding cerci). In alcohol.
February 15, 2014. Mature female nymph. 7 mm (excluding cerci). In alcohol.
Millcreek
Healdsburg, CA

Posts: 344
Millcreek on Oct 3, 2014October 3rd, 2014, 8:39 am EDT
Acentrella insignificans nymphs are abundant in the Russian River from early January through April. Most are found in riffles or at the edge of riffles, also found in lesser numbers in glides. They prefer a substrate of clean gravel and cobble. Large numbers of nymphs are often found on the underside of cobbles.
The nymphs were identified to genus using Merritt, Cummins and Berg (2008). They were identified to species using Morihara and McCafferty's "The Baetis Larvae of North America (Ephemeropttera:Baetidae) (1979). They are listed in this account under the synonym Baetis insignificans. http://www.ephemeroptera-galactica.com/pubs/pub_m/pubmoriharad1979p139.pdf I also used Jacobus and McCafferty's key for North American Acentrella larvae in "A new species of Acentrella Bergsstrom (Ephemeroptera:Baetidae) from Great Smoky Mountains National Park, USA" (2006).http://www.ephemeroptera-galactica.com/pubs/pub_j/pubjacobusl2006p101.pdf
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

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