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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 Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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.

Oldredbarn
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Jan 30, 2012January 30th, 2012, 6:07 pm EST
http://www.ausableanglers.org/files/members/RIVERWATCH/RIVERWATCH34.pdf

Thanks Tony!

This link is to May 2000 issue of the Angler's of the Au Sables "Riverwatch" #34...Read Ed McGlinn's obit and some pics of Chauncey in this issue.


Spence
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Jan 30, 2012January 30th, 2012, 7:48 pm EST
Jere -

That makes a lot of sense. Another popular color often labeled as "rust" is more accurately a shade of cinnamon. as seen in many popular versions marketed. Besides males, I wonder if this comes from the overall look (dorsal influence) of some regional females in the hand?

I've noticed there seems to be three color categories of Pale Morning Duns seen in the West and I suspect this holds for E. d. dorothea in the East as well:

1. creamy yellow
2. creamy yellow shaded with olive to varying degrees.
3. creamy yellow shaded with orange to varying degrees.

It sounds like the ones Lawson is referring to are #1. On a lot of the rivers I fish, the duns are darker varieties of 2 or 3 above, almost appearing creamy orange or light green. Their spinners are amber and olive. The most common I run into though are creamy yellow with a hint of orange giving them the 'sulfur' look. The females for those are a pale amber.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Jan 30, 2012January 30th, 2012, 8:14 pm EST
Tony & Spence -

Thanks...

Chauncey was and remains an inspiration. It was nice to see a picture of him again. They're not discussed much anymore, but I'm inspired to revisit his terrestrial styles using the hair techniques that have been supplanted by rubber & plastic. A lot has been lost with that trade-off, I think...
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Doublespey
Posts: 61
Doublespey on Jan 31, 2012January 31st, 2012, 3:57 am EST
Entoman.. I think!.. and that is always dangerous, that Lawson said the pale yellow color of the females is influenced by the eggs that were in her abdomen.
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Feb 1, 2012February 1st, 2012, 12:21 am EST
Entoman.. I think!.. and that is always dangerous...

Ha! If that's the case, I hope we expose ourselves to danger all the time here, Jere!:)

As to color influence on the abdomen from eggs, that's what I've always assumed as well. If I were to state a general rule, it's that the female spinners are a slightly darker shade of the duns. I agree with your premise though. Save the brown ones for baetids, leptophlebiids and heptageniids (unless you find males on the water on very rare occasions). But, you know what they say about general rules... :)
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

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