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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.
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York Pa.

Posts: 9
KerryWhite on Apr 1, 2010April 1st, 2010, 4:59 pm EDT
Greetings...I am starting 2 new adventures...Fly fishing for Muskies and Fly fishing for Browns at night.Does anyone kindly have any tips for me for either?,,,Fly patterns, advice, techniques etc. After flyfishing for 40 years,both of these are new to me so I am anxious for any help I may receave.As a school teacher I have given my life to teaching so I am certainly not opposed to learning.Teach me Oh wise ones!!! As always..Be safe and watch your backcast!!!! Whitie
Jmd123's profile picture
Oscoda, MI

Posts: 2474
Jmd123 on Apr 1, 2010April 1st, 2010, 5:20 pm EDT
My advice on musky: GO BIG.

Same goes for browns at night. LARGE dry flies - like sizes 10, 8, and 6, and big streamers are the way to go. The larger fish come out under the cover of darkness and they aren't looking for size 16 midge patterns...

No matter how big the one you just caught is, there's always a bigger one out there somewhere...
CaseyP's profile picture
Arlington, VA/ Mercersburg, PA

Posts: 653
CaseyP on Apr 2, 2010April 2nd, 2010, 11:29 am EDT
advice from others who know:
don't wade anywhere at night that you haven't thoroughly explored in the day. even so, take a wading staff and a flashlight. apparently it's easy to get "turned around."

and let us know how you do. i'm trying this year not to be so scared of the dark, and some motivation is needed!

"You can observe a lot by watching." Yogi Berra
York Pa.

Posts: 9
KerryWhite on Apr 3, 2010April 3rd, 2010, 1:25 pm EDT
Thank you for your help. I guess I will be throwing 6-7" streamers amd big dries for both.Be safe!! Whitie

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