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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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Grannom
Northwest PA

Posts: 87
Grannom on Apr 16, 2008April 16th, 2008, 8:38 am EDT
I fished a stream, near my house, after school Monday. It was stocked recently, but the fish have quickly developed nice colors. Each went maybe 10-11", so nothing spectacular, but they were the first of the year, and the weather was great...

The Water


Colt's Foot


And The Fish...




Mike
"Be calm - you're there..." "...Tell yourself there's no rush, even if there is."

-John Gierach
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Apr 16, 2008April 16th, 2008, 9:27 am EDT
Nice fat fish. It's great to see the year wake up and the bugs starting to come off. Another season ahead. Tight lines,
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Mcjames
Cortland Manor, NY

Posts: 139
Mcjames on Apr 17, 2008April 17th, 2008, 2:14 am EDT
those are chunky! i love the look of that water. thanks for sharing
I am haunted by waters

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