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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Lateral view of a Female Sweltsa borealis (Chloroperlidae) (Boreal Sallfly) Stonefly Adult from Harris Creek in Washington
I was not fishing, but happened to be at an unrelated social event on a hill above this tiny creek (which I never even saw) when this stonefly flew by me. I assume it came from there. Some key characteristics are tricky to follow, but process of elimination ultimately led me to Sweltsa borealis. It is reassuringly similar to this specimen posted by Bob Newell years ago. It is also so strikingly similar to this nymph from the same river system that I'm comfortable identifying that nymph from this adult. I was especially pleased with the closeup photo of four mites parasitizing this one.
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.
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JOHNW has attached this picture to aid in identification. The message is below.
JOHNW's profile picture
Chambersburg, PA

Posts: 452
JOHNW on Aug 2, 2014August 2nd, 2014, 4:01 pm EDT
ID for this guy as well as control suggestions as they are eating my oak tree.
"old habits are hard to kill once you have gray in your beard" -Old Red Barn
Healdsburg, CA

Posts: 344
Millcreek on Aug 2, 2014August 2nd, 2014, 4:27 pm EDT
John - Might be an Orange-striped Oakworm, not really a worm despite the common name. Here's a link with the latin name and a good photo.


And another link http://bugguide.net/node/view/694262/bgimage.

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Aug 3, 2014August 3rd, 2014, 9:24 am EDT
John, as far as I know bacillus thuringiensis is one of the best controls for caterpillars. It's a targeted biological control, and thus less of a risk for many other creatures.

Amazon search link
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
JOHNW's profile picture
Chambersburg, PA

Posts: 452
JOHNW on Aug 4, 2014August 4th, 2014, 6:10 pm EDT
Thanks for the info guys. My boys have come up with a great control method as well. They pull the caterpillars off the tree gathering as many as they can and then feed the neighbors laying hens. No pesticides or chemicals needed (although the "worms" do not like Sevin.
"old habits are hard to kill once you have gray in your beard" -Old Red Barn

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