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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.

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.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Female Stenonema (March Browns and Cahills) Mayfly Spinner Pictures

Lateral view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin
Artistic view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin
Dorsal view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin
Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin
Ventral view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin
Ruler view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Spinner from the Bois Brule River in Wisconsin The smallest ruler marks are 1/16".

This mayfly was collected from the Bois Brule River in Wisconsin on July 1st, 2005 and added to Troutnut.com by Troutnut on April 22nd, 2006.


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Female Stenonema (March Browns and Cahills) Mayfly Spinner Pictures

Collection details
Location: Bois Brule River, Wisconsin
Date: July 1st, 2005
Added to site: April 22nd, 2006
Author: Troutnut
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