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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.

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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 27th, 2020
During my previous trip to Slough Creek with a friend in late June 2019, we caught many nice fish on streamers, but the water was still high from snowmelt. I wanted to give it a try during a better time of year for dry fly action, so I returned at the end of July, 2020. I started hiking around 1:30 pm and reached camp at 4:00. A lightning storm that had been skirting around me stopped skirting and struck, so I crawled in the tent for a 45-minute nap. I finally got out to fish at 6:30 pm under cloudy but thunderless skies.

I quickly lost one good fish on a hopper. I also tried for way too long to catch one big fish sipping tiny mayfly duns, none of which came close enough to me to catch and identify. All I got from the fish were one or two splashy refusals. I caught a different, more sporadic riser, about 16" long, on an olive female Trico dun pattern, imitating a tiny BWO. The next pool upstream had more rising fish, but beavers and ducks put them down. I eventually caught a plump 17-incher toward dark on a big ant pattern.

The water was low, clear, and very easy to cross in many places. Lots of sandhill cranes added sound effects that felt appropriate to the place, and two whitetail does and a spike buck wandered within twenty yards of me.

Photos by Troutnut from Slough Creek in Wyoming

Slough Creek in Wyoming
Slough Creek in Wyoming

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