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.

A trackless paradise two days deep in the Yellowstone backcountry

From Mystery Creek # 218 in Wyoming

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Male Baetidae (Blue-Winged Olive) Mayfly Dun Male Baetidae (Blue-Winged Olive) Mayfly Dun

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.

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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.

Isos with green edged wings

Female Isonychia bicolor (Mahogany Dun) Mayfly Dun

13 Pictures

Lateral view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from the Namekagon River in Wisconsin

Collected June 13, 2005 from the Namekagon River in Wisconsin

Added by Troutnut on May 26, 2006

Collected June 13, 2005 from the Namekagon River in Wisconsin and added by Troutnut on May 26, 2006

Kenlindblom
Posts: 2

Kenlindblom on Jul 26, 2013July 26th, 2013, 5:24 pm EDT

I have seen Isos with the forward edge of their wings an olive color. These were also on the upper East Branch. I tied some using a permanent marker to tint the leading edges olive. But, it seems that the standard pattern works as well.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jul 26, 2013July 26th, 2013, 6:52 pm EDT

Welcome aboard, Ken. Isonychia seem to come in a wide variety of wing colors. Sounds like the ones you observed on the upper East Branch may have looked something like this:

Incidentally, you might want to update your profile with location info so folks aren't forced to guess what part of the world you are from.

Best regards,

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Kenlindblom
Posts: 2

Kenlindblom on Jul 27, 2013July 27th, 2013, 8:57 am EDT

The leading edges were a much more prominent green, covering about 25-30 %. The green was quite bright, not a subdued olive.

Martinlf