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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Male Baetidae (Blue-Winged Olive) Mayfly Dun Male Baetidae (Blue-Winged Olive) Mayfly Dun

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.

7 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.

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.

Site updates from May 8, 2004

Closeup insects by Troutnut from the Namekagon River in Wisconsin

Male Siphloplecton basale (Pseudo-Gray Drake) Mayfly Spinner

6 Pictures

Lateral view of a Male Siphloplecton basale (Metretopodidae) (Pseudo-Gray Drake) Mayfly Spinner from the Namekagon River in Wisconsin

I went to great comical lengths to swipe this spinner from the air with a little aquarium net I carry with me while I'm fishing. Siphloplecton basale spinners fly fast and high over the riffles, and there are never very many of them, so they're difficult to catch.

Collected May 7, 2004 from the Namekagon River in Wisconsin

Added by Troutnut on January 25, 2006

Collected May 7, 2004 from the Namekagon River in Wisconsin and added by Troutnut on January 25, 2006