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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.

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.
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.

Dorsal view of a Chloroperlidae (Sallfly) Stonefly Nymph from the Chena River in Alaska
GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Apr 27, 2011April 27th, 2011, 4:28 pm EDT
Hi Jason,

This is a chloroperlid. Among other traits, the tiny, asymmetrically inserted terminal segment of the maxillary palp is distinctive for this family.

The revamped site is cool. Nice work.

Best,
Lloyd
Troutnut
Troutnut's profile picture
Administrator
Bellevue, WA

Posts: 2758
Troutnut on Apr 28, 2011April 28th, 2011, 10:06 am EDT
Thanks Lloyd! Glad you like the new site look, and good to see you back online!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197
Shawnny3 on Apr 28, 2011April 28th, 2011, 6:57 pm EDT
He lives! Welcome back, Lloyd.

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com

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