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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 Female Sweltsa borealis (Chloroperlidae) (Boreal Sallfly) Stonefly Adult from Harris Creek in Washington
I was not fishing, but happened to be at an unrelated social event on a hill above this tiny creek (which I never even saw) when this stonefly flew by me. I assume it came from there. Some key characteristics are tricky to follow, but process of elimination ultimately led me to Sweltsa borealis. It is reassuringly similar to this specimen posted by Bob Newell years ago. It is also so strikingly similar to this nymph from the same river system that I'm comfortable identifying that nymph from this adult. I was especially pleased with the closeup photo of four mites parasitizing this one.
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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Male Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun Pictures

This first picture is in the dun stage.

Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from the  Touchet River in Washington
This second picture it's in the spinner stage.

Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from the  Touchet River in Washington

This mayfly was collected from the Touchet River in Washington on May 16th, 2012 and added to Troutnut.com by Bnewell on May 18th, 2012.


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Male Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun Pictures

Collection details
Location: Touchet River, Washington
Date: May 16th, 2012
Added to site: May 18th, 2012
Author: Bnewell
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