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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

This is one of the many shallow, unnamed lakes in the Arctic coastal plain near the Dalton Highway. From Dalton Highway in Alaska

Stream photos

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Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly LarvaPycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva
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.
10 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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Photos by Troutnut from the South Fork Snoqualmie River in Washington

The South Fork Snoqualmie River in Washington
The South Fork Snoqualmie River in Washington
The South Fork Snoqualmie River in Washington
The South Fork Snoqualmie River in Washington

Closeup insects by Troutnut from the South Fork Snoqualmie River in Washington

7
Female Cinygmula (Dark Red Quill) Mayfly Dun
Lateral view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
I'm calling this one Cinygmula just based on the general look and the fact that the genus is very common in this river. Official keys can't rule out other Heptageniidae, though.
12
Female Pictetiella expansa (Autumn Springfly) Stonefly Adult
Lateral view of a Female Pictetiella expansa (Perlodidae) (Autumn Springfly) Stonefly Adult from the South Fork Snoqualmie River in Washington
Based on photos, this specimen seems to key out (using Merritt & Cummins 4th Edition) to Pictetiella expansa, but some of the characteristics aren't 100 % clear. Frisonia picticeps is another possibility. The range map doesn't show Pictetiella expansa in Washington, but that species is listed elsewhere as occurring near Puget Sound, and the head markings are similar to (albeit not a perfect match for) those of a male from Colorado in the scientific literature.
6
Female Rhithrogena virilis Mayfly Dun
Lateral view of a Female Rhithrogena virilis (Heptageniidae) Mayfly Dun from the South Fork Snoqualmie River in Washington
I'm guessing this one is Rhithrogena virilis based on collection of a male spinner of similar size and body configuration during the same trip.
6
Neoleptophlebia Mayfly Nymph
Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington
8
Male Rhithrogena virilis Mayfly Spinner
Lateral view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
I'm guessing this is Rhithrogena virilis based on resemblance to a similar specimen collected last year.
11
Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun
Lateral view of a Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington
10
Drunella grandis (Western Green Drake) Mayfly Nymph
Dorsal view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
5
Ephemerella excrucians (Pale Morning Dun) Mayfly Nymph
Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from the South Fork Snoqualmie River in Washington
3
Acari (Mite) Arthropod Adult
Acari (Mite) Arthropod Adult from the South Fork Snoqualmie River in Washington

Comments / replies

Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Jun 19, 2018June 19th, 2018, 11:16 am EDT
Great photos! Thanks, Jason.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

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