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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.

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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Pyrenees
Pyrenees's profile picture
Spain

Posts: 1
Pyrenees on Apr 3, 2017April 3rd, 2017, 7:44 am EDT
The zebra trout: Trout that resisted the last glaciation.
FEATURES OF OUR NATIVE TROUT, ZEBRA TROUT:

It has many small black and red circles surrounded by a white halo and also has four dark stripes crossing his Body.

Great adaptation to our climate: large avenues, water stress and high water temperatures.

In result of the adaptation she is suspicious to predators.

The wide avenues of water and the rivers rocky mountain background seems they cause the morphology of trout oversizing their pectoral fins.

The other main feature of this type of brown trout is its speed when attacking flies.

Great power.

More than 10 spots on the Operculum.

To learn more please check this:http://www.pyreneesflyfishing.com/the-zebra-trout-trout-that-resisted-the-last-glaciation/
sss

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