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

Report at a Glance

General Regionoahu
Specific Locationvery small stream
Dates FishedJan-Feb
Fish Caughtsmallmouth
Conditions & Hatchesmidges of some sort, mosquitos...crayfish

Details and Discussion

Zzcanton
Fairbanks AK

Posts: 5
Zzcanton on Feb 5, 2007February 5th, 2007, 9:00 pm EST
so we came down with a tasking to provide MEDEVAC coverage on Oahu an the big island while the national guard here was deployed. so the first month i was here i didnt bring my fly rod (idiot). but there are some cool little streams with lots of good pocket water, with waterfalls and plunge pools and the such. so i called around and even contacted fish and game. they couldnt tell me much, but i got ahold of a guide on Wahiawa Res. (lake wilson) who guides for Largemouth, Smallmouth, and Peacock Bass there. the headwaters of the Res have smallies. so i rented a canoe and made my way about 3 1/2 miles up and got into some decent bass and even some sort of a catfish with my 3 wt on a bunny hair minnow pattern. From the guide i also got some info on a stream near downtown Honolulu. so i checked it out. me and a buddie caught 31 smallies with the biggest being 13" or so. on a 3wt it was a blast. i was using a little size 8 or so bunnie crawfish and my buddie was using a rust beadhead wooly bugger #8. i tried a chernoble ant with no luck. my tippet was too thick i think. either way, we had a blast. reminds of the steams i grew up fishing in the Adirondacks in NY. and you are in a Jungle just outside a Major city. kinda weird....but cool. so if anyone goes to Oahu for a vacation, bring the 3 wt and some flies. pretty interesting. Logan
Troutnut
Troutnut's profile picture
Administrator
Bellevue, WA

Posts: 2758
Troutnut on Feb 6, 2007February 6th, 2007, 6:46 am EST
Sounds like fun! You're going to make everybody jealous, fly fishing in Hawaii while temps in the northern USA dive below zero... we're separated from the fish by 3 months and/or 12 inches of ice!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Feb 6, 2007February 6th, 2007, 7:22 am EST
Logan, Hawaii is certainly gorgeous, and what an experience--fly fishing in paradise. Be careful wet-wading those streams, though; some have a nasty bacteria in them that can make you very sick. Check with local authorities. I also understand that there are also a few bonefish around the islands if you can find them, so travelers may want to pack a bigger rod too.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Zzcanton
Fairbanks AK

Posts: 5
Zzcanton on Feb 6, 2007February 6th, 2007, 6:08 pm EST
i am definately gonna try to hit up some bonefish while i am here as well. i have never caught them before but know they are a real fight. there are warning signs around the stream we were wet wading, i think it was leptospirosis?? something like that, from rat pee or something. i got a cut on my foot too...i should start twitching an frothing at teh mouth soon...oh well, i am not too worried. i mean you HAVE to fish under all conditions, no matter what. Logan
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Feb 7, 2007February 7th, 2007, 12:04 am EST
Rat pee or pig poop, I can't remember which. But a dose of antibiotic should stop the twitching. Best of luck with the bones.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

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