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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

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 Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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.

Troutnut.com User Troutnut (Jason Neuswanger)

Troutnut.com User Troutnut (Jason Neuswanger)

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Jason Neuswanger
Bellevue, WA
Biography & Thoughts
I'm a salmonid research scientist with the Washington Department of Fish and Wildlife since 2022. I completed my Ph.D. in 2014 at the University of Alaska. I created Troutnut.com in February 2004 and worked on it full-time during various short breaks from school and work.
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Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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