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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 Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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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Kinalia
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georgia. Tbilisi

Posts: 15
Kinalia on Oct 6, 2012October 6th, 2012, 12:19 am EDT
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How beautiful the world!
Jmd123
Jmd123's profile picture
Oscoda, MI

Posts: 2474
Jmd123 on Oct 6, 2012October 6th, 2012, 6:59 am EDT
Nice photos! Very interesting looking brown trout with the evenly-spaced red spots. The color variations of brown trout never fail to fascinate me. That pool in the top photo is absolutely beautiful!

Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Oct 8, 2012October 8th, 2012, 7:03 am EDT
Wow. Beautiful! Thank you!
Lastchance
Portage, PA

Posts: 437
Lastchance on Oct 8, 2012October 8th, 2012, 12:14 pm EDT
What a great place.
Mcjames
Cortland Manor, NY

Posts: 139
Mcjames on Jan 7, 2013January 7th, 2013, 8:18 am EST
gamaurjoba, genetswali!

beautiful pictures
I am haunted by waters

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