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.

Stream photos

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Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph Setvena wahkeena (Wahkeena Springfly) Stonefly Nymph

Dorsal view of a Setvena wahkeena (Perlodidae) (Wahkeena Springfly) Stonefly Nymph from Mystery Creek #199 in Washington

As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.

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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.

Do small streams turn off earlier in the evening?

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Jul 27, 2006July 27th, 2006, 3:24 pm EDT

I fish small streams quite a bit, and I almost always do poorly in the last half-hour before dark. This seems strange since that's usually the best time of day on the larger rivers I fish.

I wonder if there's something to it, and the fish become inactive earlier, or if it's just that they're harder to fish effectively without being able to see what you're doing. My guess would be the latter.

Has anyone else noticed this?

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

Wiflyfisher

Wisconsin

Posts: 622

Wiflyfisher on Jul 28, 2006July 28th, 2006, 9:03 am EDT

Jason, I think you have to also consider the surrounding habitat and how that might effect the fishing situation. As example, a smaller stream in the East and Midwest (ie: Long Branch, Big Brook, etc...) has much more overhead cover (trees shading the water), less sunlight and lower water temps than most larger (wider) rivers. This could definitely effect the hatch / feeding cycle.

John

John S.
https://WiFlyFisher.com