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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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Falsifly
Falsifly's profile picture
Hayward, WI.

Posts: 660
Falsifly on Jun 17, 2015June 17th, 2015, 12:03 pm EDT


The “Dog Days” of August had the Ephemeroptera lacking in their evening nuptials and as a consequence my trout teasing was leaving me frustrated, I couldn’t even get a rise. My thoughts drifted as I panned the plethora of possible enticement contained in a myriad of boxes, exceeded only by the number of pockets in my vest……. (I fell for the Orvis advertising gimmick of pockets stacked like Russian dolls. Initially I had a deep desire to never feel wanting for paraphernalia while on the water, but I have since relieved my back of useless crap.)…….when my eyes fell upon three number 14 Madam X’s which I tied years ago. I think it was back in my early tying days when I first started playing with “deer hair” or was it “elk hair”? I can’t remember. Anyway I thought maybe a little stimulation with those long straight legs might just prove enticing enough for something, hell for anything, to at least come up and take a peek.

I was standing mid-shin deep in firm sand facing upstream. Before me off my right shoulder was a narrow fast current tongue ripping over bowling ball size rocks at about knee depth. I might add that this is an upper WI. freestone of the more round and polished rock type. The water surface in the tongue was such that I figured that Madam X would instantly be drowned and rendered useless as a dry. Off my left shoulder was the bank and quiet water. Between I had about ten feet of what I considered fish holding opportunity and that was my focus. My plan was to drift the Lady from directly above just on the edge of the torrent.

My first cast placed Madam on the water surface in an area which quite frankly resembled the suppleness of fine satin sheets. She twisted and turned gently undulating with the soft current’s hold, as I manipulated her with a deft hand at mending, revealing to the underworld her bottom side from every angle. Even I was being taken in. Watching every enticing move she made as she danced her way toward me the expectation of a climactic explosion became palpable. But suddenly my expectation was dashed as the Lady switched her tactics. My deft hand at mending was somehow lost in the foreplay. She lost her soft and gentle side and was quickly dragged into the rough and tumble side better described as risqué. She entered the frenzy and I had lost all hope that she could remain enticing with the maniacal dance now being performed as the satin sheets were being shed at a feverous rate. I couldn’t determine if she was trying to strip off her clothing or if it was being ripped from her as she descended the torrent at an ever increasing frenzied pitch. I watched in complete awe as she stayed on top not once faltering in the heat of the moment. And then, at the peak of one of the wildest rides the Madam and I had shared that day, she left me euphoric. She pulled one out of a spot for me that I would have bet my last dollar held nothing. That was the first of three times in two hours on a hot August afternoon. Madam X and I haven’t been together since, but I often think of her and wonder if the magic is still there.
Falsifly
When asked what I just caught that monster on I showed him. He put on his magnifiers and said, "I can't believe they can see that."

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