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.

Mount Deborah and Hess Mountains. Two of the greatest peaks of the Alaska Range rise behind the braided, glacial Susitna River. These massive mountains are 35 miles north of where I took this picture.

From the Susitna River in Alaska

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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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.

Unknown mayfly?

Braindead has attached this picture to aid in identification. The message is below.

Braindead
Niwot, Colorado

Posts: 2

Braindead on Aug 9, 2013August 9th, 2013, 11:34 am EDT

Greetings from Colorado. I'm a new member of the troutnut site and have a question of those knowledgeable about mayflies. Earlier this year I had the privilege of getting to fish a private lake up near Estes Park, Colorado. I fished with 4 other friends from canoe, row boat and yes even a paddle boat. Near the end of our morning, a mayfly landed on my little finger and I managed to get a quick snapshot of it (attached).

Any idea what this little critter is? I've looked around this and a few other sites but can't positively identify it.

Thanks!

Chester Shans

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Aug 9, 2013August 9th, 2013, 3:05 pm EDT

Hi Chester-

Welcome to the troutnut forum. The mayfly on your finger in the attached photo is a male imago (spinner) of genus Callibaetis, probably Callibaetis ferrugineus hageni.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Entoman

Northern CA & ID

Posts: 2604

Entoman on Aug 9, 2013August 9th, 2013, 4:10 pm EDT

I agree.

"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

Braindead
Niwot, Colorado

Posts: 2

Braindead on Aug 9, 2013August 9th, 2013, 6:22 pm EDT

Thanks much for the speedy reply. My fly fishing friends and I appreciate the quick answer.

Chester

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Aug 9, 2013August 9th, 2013, 7:06 pm EDT

You are certainly welcome, Chester. It was our pleasure to be able to help you and your fly fishing friends.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com