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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.

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.
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Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Apr 2, 2015April 2nd, 2015, 1:30 pm EDT
Apparently to you that means fish over 10" which is a random measure not to mention unscientific.

Yes, I'm very unscientific and probably not very much unlike most guys on this forum who want to feel a tug. I selected the unscientific length of 10" because IMO anything less than 10" isn't going to tug very hard and I will be bored. That is my opinion and I know lots of guys just love fishing little water for little fish and that is fine for them but not for me.

I'm not stating this on fish caught on hook and line instead what I am telling you is from data collected from electrofishing surveys.

For guys who fish the "caught on hook and line" is pretty much all we care about at the end of the day. Of course we are interested in the watershed as a whole and want it to be nice and pretty and self sustaining and all that other good stuff. But if the guy who is out on the water, who is pretty skillful, isn't catching those wild brooks, browns, and whatever else is there then the electrofishing survey results don't mean jack.
Catskill fly fisher for fifty-five years.
NW PA - Pennsylvania's Glacial Pothole Wonderland

Posts: 398
RleeP on Apr 2, 2015April 2nd, 2015, 1:47 pm EDT
>>Well a "good head of wild fish"is a subjective term.>>


When we are talking about healthy small to medium Appalachian freestones, whether or not a stream has "good head of wild fish" has absolutely nothing to do with how large the fish are.

Posts: 106
MiltRPowell on Apr 2, 2015April 2nd, 2015, 3:54 pm EDT
Wow,wow,wow,wow,wow,wow,wow,wow,wow,wow,wow,wow wow wow,woe....You only get out of a body of water, what ya put into it. Not meaning fish per say. If your home water needs help, help it. And to do that you have to get your hands dirty & work & listen to others that are in the know of things. As been there done that. As a body, you make changes not for man, but for the heath & welfare of the living things in your water. Then with some prayers & luck you notice change. As per, better habitat, better bugs, better water flow, better water, in all better, stronger fish, & growth in said Trout. It just don't happen, bitching on it,& sitting on ones said,ass!! And this is nothing I haven't stated before in said ,meetings on the creek this, the trout that, give me a brake. Hey if a tree falls down in your yard do you leave it there??? Same with home water,no ya remove it. Work it's called, do most people care,no, but matters to the ones that do care. Closing: Provide better, you get better, but whatever... whatever floats your fly.And you really try to have a nice day, with thinking the ckicken came before the egg......

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