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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Case view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
It's only barely visible in one of my pictures, but I confirmed under the microscope that this one has a prosternal horn and the antennae are mid-way between the eyes and front of the head capsule.

I'm calling this one Pycnopsyche, but it's a bit perplexing. It seems to key definitively to at least Couplet 8 of the Key to Genera of Limnephilidae Larvae. That narrows it down to three genera, and the case seems wrong for the other two. The case looks right for Pycnopsyche, and it fits one of the key characteristics: "Abdominal sternum II without chloride epithelium and abdominal segment IX with only single seta on each side of dorsal sclerite." However, the characteristic "metanotal sa1 sclerites not fused, although often contiguous" does not seem to fit well. Those sclerites sure look fused to me, although I can make out a thin groove in the touching halves in the anterior half under the microscope. Perhaps this is a regional variation.

The only species of Pycnopsyche documented in Washington state is Pycnopsyche guttifera, and the colors and markings around the head of this specimen seem to match very well a specimen of that species from Massachusetts on Bugguide. So I am placing it in that species for now.

Whatever species this is, I photographed another specimen of seemingly the same species from the same spot a couple months later.
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.

Motrout's profile picture
Posts: 319
Motrout on Mar 21, 2010March 21st, 2010, 7:25 am EDT
I'll be headed up to the ADKs either late June or early July, primarily to fish the West Branch of the Ausable. I went up and fished it for a week two years ago (Late July, early August), and while I caught some small browns in the main river and brookies in the tribs, and I don't feel like I got all there is to get. I don't want or need specific locations, as I know a couple good spots, but first off, is Late June a good time, and are there some good hatches, techniques that time of year I need to know?

Thanks for any help

If this is too specific of a question to ask, (since it regards a specific river) just tell me and I'll shut up.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Mar 21, 2010March 21st, 2010, 8:18 am EDT
I can't help you with the Ausable, since I don't know it, but I don't find the questions at all too specific. For anything that is really sensitive like specific spots that some of us are willing to share with one person, but not the whole world, we often use a PM (Personal Message) which can be sent through the (my home)section of the site. Someone might want to PM you some of the information you ask about.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Mar 21, 2010March 21st, 2010, 2:02 pm EDT
Here is a link to one of many Adirondack hatch charts I located in about ten seconds by Googling "Adirondack hatch charts".
Catskill fly fisher for fifty-five years.
Motrout's profile picture
Posts: 319
Motrout on Mar 22, 2010March 22nd, 2010, 12:54 am EDT
Thanks a lot. That helps.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach

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