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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

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.

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.

Updates from June 29, 2011

Updates from June 29, 2011

Closeup insects by Bnewell from the Touchet River in Washington

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

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Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Jul 2, 2011July 2nd, 2011, 8:42 am EDT
This appears to be a female dun.
Troutnut's profile picture
Bellevue, WA

Posts: 2758
Troutnut on Jul 2, 2011July 2nd, 2011, 1:40 pm EDT
Thanks Lloyd. I fixed it. When someone is adding as many new specimens as Bob has lately, it's easy to accidentally skip over one of the little dropdown menus and leave it set to the default, and the site doesn't have automatic safeguards against overlooking stuff like that... so the users are the safeguard.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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