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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 Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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 # 23

The Mystery Creek # 23 in New York
This beautiful brookie comes from a very remote, crystal-clear small stream in the Catskills.
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
Lena wading across the riffle to catch up with me.

From the Mystery Creek # 23 in New York
The clear little stream I was fishing is fed by a tiny tributary running across a beautiful bed of nothing but moss.

From the Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York

Underwater photos from Mystery Creek # 23

Well, this is one way to make 'em pose... keep them on the line!

This one settled next to the camera pretty nicely as soon as I let off the tension.

From the Mystery Creek # 23 in New York
I love this mossy plant on so many of the rocks in this stream.

From the Mystery Creek # 23 in New York
Not a bad home if you're a brook trout.

From the Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
Underwater moss and riffle bubbles.

From the Mystery Creek # 23 in New York
The Mystery Creek # 23 in New York
I got a nice picture of the pool these salamander larvae inhabit a few weeks later.

From the Mystery Creek # 23 in New York

Closeup insects by Troutnut from Mystery Creek #23 in New York

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