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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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Martinlf
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Martinlf on Jan 31, 2016January 31st, 2016, 8:43 pm EST
We have a couple of "most interesting" threads, but I'm wondering if we can sift through from time to time and find the threads that concentrate information on hatches and flies for them. I know there's a very good Grannom thread or two, and some very good information on Tricos. Well, I'll just throw this on the wall and see what sticks. I'll try to find that Grannom thread (or a couple of them) to start.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Jan 31, 2016January 31st, 2016, 8:47 pm EST
OK here's one of the Grannom threads, with a bit about PA Paraleps at the end: http://www.troutnut.com/topic/298/grannom-caddis
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
PaulRoberts
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PaulRoberts on Feb 1, 2016February 1st, 2016, 4:53 am EST
Yes, that one's a gem.
Martinlf
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Martinlf on Feb 1, 2016February 1st, 2016, 4:46 pm EST
Here's an olive thread disguised as a trico thread. We have another thread on summer olives that I'll try to find.

http://www.troutnut.com/topic/6734/Trico
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 1, 2016February 1st, 2016, 4:51 pm EST
Here's the other summer olive thread I was thinking of. Then perhaps on to Tricos. Though I should have tracked down a few more Grannom threads first. Perhaps later.

http://www.troutnut.com/topic/227/Centroptilum-or-Procloeon
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 5, 2016February 5th, 2016, 3:32 pm EST
Just for Matt, another Grannom thread. This is a good one with fly patterns etc. http://www.troutnut.com/topic/6591/Brachycentrus-Pupal-Behavior
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 5, 2016February 5th, 2016, 3:36 pm EST
More grannoms, this time larvae and some more fly patterns. Eric has a great photo of a grannom adult with a cut away wing, but I can't find the thread. Perhaps he'll locate it for us.

http://www.troutnut.com/topic/7197/How-big-is-a-Grannom-larva
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 5, 2016February 5th, 2016, 3:59 pm EST
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 5, 2016February 5th, 2016, 4:07 pm EST
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 6, 2016February 6th, 2016, 6:49 am EST
Interesting Green Drake thread. For photos, the Troutnut Encyclopedia is the best place to go generally. But there are some amazing photos scattered through the Forum threads also. Here are some of them:

http://www.troutnut.com/topic/1923/Eastern-Green-Drake-Variations
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 6, 2016February 6th, 2016, 6:52 am EST
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 6, 2016February 6th, 2016, 7:04 am EST
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 6, 2016February 6th, 2016, 7:09 am EST
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Martinlf
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Martinlf on Feb 6, 2016February 6th, 2016, 8:31 am EST
Good thread on pale nymphs with some great ties by Paul: http://www.troutnut.com/topic/6423/Pale-or-white-nymphs
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
PaulRoberts
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PaulRoberts on Feb 7, 2016February 7th, 2016, 7:27 am EST
Wow. What a great site! What a compilation.

Here's a timely one on Baetis:
http://www.troutnut.com/topic/6487/Instant-Baetid-Nymph-Patterns

Here's one I liked that considers eclectic feeding:
http://www.troutnut.com/topic/6630/Stomach-Contents-Eclectic-Feeding-and-Selectivity
Crepuscular
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Crepuscular on Feb 12, 2016February 12th, 2016, 9:02 am EST
More grannoms, this time larvae and some more fly patterns. Eric has a great photo of a grannom adult with a cut away wing, but I can't find the thread. Perhaps he'll locate it for us.



I think I cryptically titled the thread "Grannoms" :)

http://www.troutnut.com/topic/7900/Grannoms
Troutnut
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Troutnut on Feb 12, 2016February 12th, 2016, 10:07 pm EST
Great idea to start this one, Louis!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Crepuscular
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Crepuscular on Feb 26, 2016February 26th, 2016, 7:30 am EST
Here is one I found particularly interesting, especially Paul's mention of Eurylophella duns.

http://www.troutnut.com/topic/3396/Will-the-real-Ephemerella-needhami-please-stand-up

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