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.

Stream photos

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Female Sweltsa borealis (Boreal Sallfly) Stonefly Adult Female Sweltsa borealis (Boreal Sallfly) Stonefly Adult

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.

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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.

More detailed ID?

Female Neophylax (Autumn Mottled Sedge) Caddisfly Adult

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Lateral view of a Female Neophylax (Thremmatidae) (Autumn Mottled Sedge) Caddisfly Adult from Mystery Creek #43 in New York

This large caddisfly looks really neat close-up.

Collected September 18, 2006 from Mystery Creek #43 in New York

Added by Troutnut on October 4, 2006

Collected September 18, 2006 from Mystery Creek #43 in New York and added by Troutnut on October 4, 2006

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Oct 4, 2006October 4th, 2006, 1:08 pm EDT

I took lots of pictures of this large caddisfly hoping one of the caddis gurus here can identify it to a more detailed level than I. I was able to follow the key in Merritt & Cummins through to Phryganeidae, though I might have made a mistake.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

Vshivkova
Posts: 2

Vshivkova on Nov 18, 2006November 18th, 2006, 11:57 am EST

It is not Limnephilidae, I guess it is some of Neophylax or other Thremmatinae. My reasons:a) color pattern look as in many Neophylax; at the base of hind leg spurs the only one black spine (in Limnephilidae - two sines; in Thremmatinae - 0 or one); 2) female genitalia is not as in Limnephilidae s.str.