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 small spring creek in Wisconsin. A little brook trout stream tumbles over boulders

Stream photos

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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.

7 Recently Added Photos

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.

Defensive posture

Pteronarcys dorsata (Salmonfly) Stonefly Nymph

3 Pictures

Dorsal view of a Pteronarcys dorsata (Pteronarcyidae) (Salmonfly) Stonefly Nymph from unknown in Wisconsin

Pteronarcys nymphs live for two years before maturing. This small one is in its first year.

Collected March 9, 2004 from unknown in Wisconsin

Added by Troutnut on January 19, 2006

Collected March 9, 2004 from unknown in Wisconsin and added by Troutnut on January 19, 2006

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Jun 29, 2008June 29th, 2008, 12:33 pm EDT

Is Pteronarcys the one that curls into a fetal position when disturbed? I don't see any pictures like that in this section, but I'm pretty sure a stone I saw do that today was one of these.

-Shawn

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

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Jun 29, 2008June 29th, 2008, 1:58 pm EDT

Hi Shawn,

Yes. A few other stoneflies will do that as well, but it is so characteristic of Pteronarcys that they are sometimes called "curlers."