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.

Mount Deborah and Hess Mountains. Two of the greatest peaks of the Alaska Range rise behind the braided, glacial Susitna River. These massive mountains are 35 miles north of where I took this picture.

From the Susitna River in Alaska

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

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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