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.

Mount Deborah and Hess Mountains. Two of the greatest peaks of the Alaska Range rise behind the braided, glacial Susitna River. These massive mountains are 35 miles north of where I took this picture.

From the Susitna River in Alaska

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

11 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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Neoleptophlebia Mayfly Nymph Pictures

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington

Ruler view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".

Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington

Ventral view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on July 3rd, 2018.

Discussions of this Nymph

Neoleptophlebia

Posted by Millcreek on Jul 19, 2019

Last reply on Jul 19, 2019 by Millcreek

This nymph should be under Neoleptophlebia. Paper is here. http://biosoil.ru/files/00013828.pdf

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