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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.

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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.

By Troutnut on September 21st, 2020
I wanted to get out one fishing and hone my fledgling Euro nymphing skills one more time before today's major beginning to the fall rainy season, so last night I drove way up the Middle Fork of the Snoqualmie to fish a section of fast pocket water for a couple hours.

Working my way up the line of slippery car-sized boulders and fallen trees that comprise the river bank, sandwiched between the roaring whitewater and impenetrable vegetation, was as much an exercise in gymnastics as in fishing. However, I found plenty of what I came for: interesting nymphing water and very pretty, very small coastal cutthroat and rainbow trout. The largest of the couple dozen fish landed were a pair of 9-inch cutthroat. I could have found slightly bigger fish downstream closer to town, but the seclusion of the headwaters was worth the extra drive.

Photos by Troutnut from the Middle Fork Snoqualmie River in Washington

The Middle Fork Snoqualmie River in Washington
The Middle Fork Snoqualmie River in Washington
Coastal cutthroat
Rainbow trout
Coastal cutthroat
The Middle Fork Snoqualmie River in Washington
Rainbow trout still with vivid parr marks
The Middle Fork Snoqualmie River in Washington

Comments / replies

Martinlf
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Moderator
Palmyra PA

Posts: 3047
Martinlf on Sep 24, 2020September 24th, 2020, 9:47 am EDT
Beautiful scenery, beautiful fish. Thanks so much for sharing.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Wbranch
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Sep 27, 2020September 27th, 2020, 10:20 am EDT
Why do the 5th and 8th trout have parr marks on them? Because they are still immature or is that a trait of those rainbows? Also what are the orange slivers on the tail of the 5th trout?
Catskill fly fisher for fifty-five years.
Troutnut
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Administrator
Bellevue, WA

Posts: 2758
Troutnut on Sep 27, 2020September 27th, 2020, 1:16 pm EDT
The orange slivers on the tail are dead conifer needles that stuck to the tail when it touched the ground.

Lots of salmonids seem to at least partly retain their parr marks into maturity in streams where they don't have the potential to grow very big in the first place, including this one. These mountain rivers on the west slope of the Cascades are cold, with short growing seasons and not a ton of nutrients. You can see the same thing on my pictures of resident coastal rainbows from another drainage a couple weeks earlier.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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