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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Dorsal view of a Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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.

Closeup insects by Bnewell from the Touchet River in Washington

This first picture is in the dun stage.

Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from the  Touchet River in Washington
Male Neoleptophlebia heteronea (Leptophlebiidae) (Blue Quill) Mayfly Spinner from the  Touchet River in Washington

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Posts: 1
Marsha on Jun 12, 2012June 12th, 2012, 2:41 pm EDT
Jason, I work for a not-for-profit company, Professor Garfield, which, in conjunction with the state of Indiana and Ball State University, is putting together an educational web-site for migrant children. We are building science modules. One of our needs for our life cycle modules are photo/video images of dragonfly nymphs, eggs, and dragonflies laying eggs. Would you give permission for us to use your video/photo of a dragonfly nymph? Do you have and could we use any other dragonfly life stage images you have?

Best to you-- Marsha Jacobson
Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Jun 12, 2012June 12th, 2012, 6:09 pm EDT
Marsha, you might PM Jason directly. I don't know how busy he is, but if he's in the field he might not check in immediately. A PM may show up on his email, alerting him to your request.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Troutnut's profile picture
Bellevue, WA

Posts: 2758
Troutnut on Jun 12, 2012June 12th, 2012, 6:23 pm EDT
Marsha, you're welcome to use anything I have here on the site. I don't have anything other than what's online, though.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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