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.

My then-girlfriend, now-wife took this picture with my camera.

From Toughannock Creek in New York

Stream photos

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Zapada cinctipes (Tiny Winter Black) Stonefly Nymph Zapada cinctipes (Tiny Winter Black) Stonefly Nymph

Dorsal view of a Zapada cinctipes (Nemouridae) (Tiny Winter Black) Stonefly Nymph from the Yakima River in Washington

Nymphs of this species were fairly common in late-winter kick net samples from the upper Yakima River. Although I could not find a key to species of Zapada nymphs, a revision of the Nemouridae family by Baumann (1975) includes the following helpful sentence: "2 cervical gills on each side of midline, 1 arising inside and 1 outside of lateral cervical sclerites, usually single and elongate, sometimes constricted but with 3 or 4 branches arising beyond gill base in Zapada cinctipes." This specimen clearly has the branches and is within the range of that species.

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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