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

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.

Lastchance
Portage, PA

Posts: 437
Lastchance on Oct 6, 2009October 6th, 2009, 11:18 am EDT
This is a link to the Barr BWO Emerger below:
http://www.flyfisherman.com/ftb/jbemerge/index.html


What colors would I use to tie it for Central, PA streams?

I was thinking:
trailing shuck: brown hackle fibers or brown zelon
body: brown/olive thread
thorax: brown/olive dubbing mix
wingcase: gray hackle fibers
Legs: gray hackle fibers pulled back and cut


Do you think I have it nailed? Please advise.

Thanks,
Bruce
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Oct 6, 2009October 6th, 2009, 2:28 pm EDT
That will work, Bruce. I also like a Klinkhamer style emerger with a dark abdomen and lighter thorax for olives.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
JAD
JAD's profile picture
Alexandria Pa

Posts: 362
JAD on Oct 7, 2009October 7th, 2009, 2:36 pm EDT
Hi Bruce

We never did meet up, I tie one with pheasant tail and griz parachute hackle with a pink post that has fooled some pressured fish sizes range from 20 to 26. Try dragging a Als Rat behind your emerger- About 12 inches see what happens.

John

They fasten red (crimson red) wool around a hook, and fix onto the wool two feathers which grow under a cock’s wattles, and which in colour are like wax.
Radcliffe's Fishing from the Earliest Times,
Lastchance
Portage, PA

Posts: 437
Lastchance on Oct 8, 2009October 8th, 2009, 12:56 pm EDT
HI John: Hope all is well with you. I hope you're catching a bunch of fish. I guess the thorax is olive on the PT and grizzly you tie? I never though of tying Al's Rat. I've heard of it, but never have fished it.
Bruce
Lastchance
Portage, PA

Posts: 437
Lastchance on Oct 9, 2009October 9th, 2009, 4:11 am EDT
What do you guys think of using some kind of gray antron, ice dub, poly yarn, etc. for the win case?

What color is the thorax on these fall olives?
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Oct 11, 2009October 11th, 2009, 3:30 am EDT
Hi Bruce,

I caught fish this weekend with an emerger that has an olive body and thorax. I used CDC for wing sprouts and a yellow polyyarn wingcase to split the short CDC fibers. The wingcase is more for flotation and visibility. I think any number of things could work, and for the Barr's emerger, using polyyarn for the wingcase and tying back some strands for legs/wing sprouts, might make a very good emerger for the film, if you can figure out a way to see it. Perhaps hang it behind a dry, as John suggests. Best of luck! Some of the olives now are small, size 22 or 24.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

Quick Reply

Related Discussions

Topic
Replies
Last Reply
1
Oct 4, 2006
by Troutnut
12
Mar 28, 2013
by Sayfu
4
Mar 30, 2013
by Sayfu
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy