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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
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.

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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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Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on Mar 17, 2013March 17th, 2013, 8:53 am EDT
SO I have pumped few stomachs in the last few years on the Lower Owens river and found little bits of something iridescent teal. I could not figure out what it was... Last month I did the same thing and found a live one just eaten by a trout.
It was a Caddis worm black head but the body was a iridescent teal.
Now I have no idea if this is a particular kind of Caddis of just a stage it goes through.
Any Ideas or have you seen this.....

Mark F.

It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
Taxon
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Mar 17, 2013March 17th, 2013, 10:27 am EDT
Hi Tigermidge-

Sounds to me like you may be describing a caddisfly larva of genus Rhyacophila. Did it look like this?

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Mar 17, 2013March 17th, 2013, 1:27 pm EDT
Welcome to the forum, Tigermidge. Was the body largely unicolorous or was the back noticeably darker? How big was it?
"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
Sayfu
Posts: 560
Sayfu on Mar 17, 2013March 17th, 2013, 1:41 pm EDT

from my knowledge if the nymph has 3 plates behind the head it is the spotted, or tan caddis, (hydropsyche), if only one plate it is more than likely Rhyacophila in the green body #14-16 hook size.
Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on Mar 17, 2013March 17th, 2013, 4:05 pm EDT
@ Entoman: it was largely unicolorous. And about 3/4 of an inch long.
I wish I had my camera that day..
One note is the body did NOT have segmentation to it.
I have tried to tie some fly's that look like it, if I can I'll post them tonight.

Thanks for your input.

Mark
It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
Tigermidge
Lakewood, Ca.

Posts: 10
Tigermidge on Mar 17, 2013March 17th, 2013, 4:50 pm EDT


Here are my first attempts at duplication. But the body was not segmented.
The top ones are closest...I have UV Teal dubbing coming, we will see how this turns out.
Mark
It's impossible to explain the attraction except to say that steelheading is like golf: viewed objectively , it makes no sense, but some people like it.
Crepuscular
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Mar 17, 2013March 17th, 2013, 5:15 pm EDT
But the body was not segmented.


Hey Mark, is it possible that you were not able to see the segmentation? I'm wracking my brain trying to think of any aquatic macroinvertebrate, insect or non insect that lacks segmentation other than clams and mussels etc. Epecially with the coloration you describe. I do not even pretend to know the inverts of the western us, but what you describe really sounds like a caddis or a dipteran, did it have legs?
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Mar 17, 2013March 17th, 2013, 7:46 pm EDT
It's probably a Tipulidae (Crane Fly) larva. The lower Owens is the wrong habitat for rhyacophilids (Green Sedges). The specimen also sounds too big for the hydropsychids (Little Sister Sedges) that low in the system.
"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
Crepuscular
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Mar 18, 2013March 18th, 2013, 6:36 am EDT
It's probably a Tipulidae (Crane Fly) larva. The lower Owens is the wrong habitat for rhyacophilids (Green Sedges). The specimen sounds too big for the hydropsychids (Little Sister Sedges) that low in the system.


I was wondering if it might be some sort of dipteran. They come in some crazy colors and I suppose the segmentation may be hard to discern.
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Mar 18, 2013March 18th, 2013, 8:21 am EDT
Yes, they (segs) can go unnoticed in the hand with this family. The chunky imitations and his mention of iridescence also point that direction as some have an almost opalescent quality. Of course, if it has legs... Good question, BTW.
"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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