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The Specimen

Pteronarcys dorsata (Giant Black Stonefly) Stonefly NymphPteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph View 3 PicturesPteronarcys nymphs live for two years before maturing. This small one is in its first year.
Collected March 10, 2004 from unknown in Wisconsin
Added to Troutnut.com by on January 19, 2006

The Discussion

Shawnny3June 29th, 2008, 4:33 pm
Moderator
Pleasant Gap, PA

Posts: 1197
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
GONZOJune 29th, 2008, 5:58 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
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."

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