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 view of the pipeline, the Atigun River, and an impressive sunset/rise was one of my first views of the North Slope as I came through Atigun Pass in the middle of the night.

From the Atigun River in Alaska

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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.

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.

Great pictures Jason

Ameletus ludens (Brown Dun) Mayfly Nymph

7 Pictures

Dorsal view of a Ameletus ludens (Ameletidae) (Brown Dun) Mayfly Nymph from Mystery Creek #62 in New York

Collected March 31, 2007 from Mystery Creek #62 in New York

Added by Troutnut on April 3, 2007

Collected March 31, 2007 from Mystery Creek #62 in New York and added by Troutnut on April 3, 2007

CalebBoyle
Charlotte, NC

Posts: 11

CalebBoyle on Apr 4, 2007April 4th, 2007, 4:04 pm EDT

Thanks for the pics of this genus Jason. I had sampled a creek that I live close to and had collected something that I thought was Siphloplecton, but afer seeing your photos it must be Ameletus.

CalebBoyle
Charlotte, NC

Posts: 11

CalebBoyle on Apr 4, 2007April 4th, 2007, 4:07 pm EDT

Looks similar to me. It's amazing how the colorations can vary.

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Apr 4, 2007April 4th, 2007, 5:49 pm EDT

Nice pic Caleb. That's gotta be the same mayfly.

The real distinguishing characteristic is in the mouth parts, which can be verified on my specimen, but the markings are so similar that we've clearly got the same insect.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

CalebBoyle
Charlotte, NC

Posts: 11

CalebBoyle on Apr 5, 2007April 5th, 2007, 1:43 pm EDT

The thing that threw me was the three dark lines on the underside of the abdomen.

Flytyer0423
germansville PA

Posts: 14

Flytyer0423 on Sep 9, 2009September 9th, 2009, 1:07 pm EDT

this one is screaming for a pheasant tail nymph imitation.

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