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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
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.

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington
This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
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.

About "Mystery Creeks": If you recognize one of these, you already understand why I'm keeping it a secret. I'm not as strict as some anglers about hiding where I fish, mostly because I don't expect to substantially affect fishing pressure on already well-known or simply unpopular waters. But there are some gems where I don't want to add a single unfamiliar bootprint to the mix, due to the fishing, their wild character, or keeping a friend's secret. They're all "Mystery Creek" here—even the lakes.

Landscape & scenery photos from Mystery Creek # 227

View up from the river

From Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana
Mystery Creek # 227 in Montana

On-stream insect photos from Mystery Creek # 227

Flying ants were falling very thick on the water during a beautiful Montana evening in August. They were collected in great numbers in this eddy, which made it difficult to entice a trout with a fly amidst all the naturals, but a few nice browns were fooled.

From Mystery Creek # 227 in Montana

Closeup insects by Troutnut from Mystery Creek #227 in Montana

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