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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 Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
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.
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By Troutnut on July 6th, 2019
After camping atop the Gravelly Range and mostly dodging thunderstorms throughout the day, we set up to camp in the evening at Cottonwood Campground along the upper Ruby and drove to fish a nearby reach that looked good on Google Earth. There wasn't much visible bug activity and I didn't see a single fish, but I did manage to find five small to medium rainbows on nymphs and soft-hackles.

Photos by Troutnut from the Ruby River in Montana

Open country way up in the headwaters of the Ruby near the Gravelly Range road.

From the Ruby River in Montana
The Ruby River in Montana
One of five small-medium rainbows I caught on the Ruby despite high water from a recent thundershower.
The Ruby River in Montana
Headwaters of the Ruby.

From the Ruby River in Montana

Closeup insects by Troutnut from the Ruby River in Montana

Ruler view of a Male Drunella (Ephemerellidae) (Blue-Winged Olive) Mayfly Dun from the Ruby River in Montana The smallest ruler marks are 1 mm.

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