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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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Mcflyangler
Mcflyangler's profile picture
New Mexico, United States

Posts: 35
Mcflyangler on Feb 17, 2017February 17th, 2017, 5:07 am EST
Appropriately named the "slump buster" is really a buster of slumps. This fly is so easy to tie, yet so effective! You can tie up 10-20 in an hour, and is effective for so many species of fish. Its tail moves wonderfully, the front body is wide almost like a sculpin, and its got enough weight to give some jig action. You can catch bass, crappie, small pike, many species of saltwater fish, and mostly trout. In fact, the last time I fished with this fly I caught a nice 24-25" wild brown trout on the Animas River, in Durango Colorado. This is for sure one of my go to streamers for trout fishing. Being so easy to tie, I always have a few of these in my box.



Hook: Umpqua U301 - size 10
Thread: UTC ultra thread 70 - Brown/olive
Weight: 4.8mm brass cone head
Body: UTC sparkle braid - UV Fl. chartreuse
Tail and head: Pine squirrel strips: Sculpin olive.
Mc Fly Angler
http://www.mcflyangler.com
https://www.youtube.com/c/mcflylures
Shawryliak
PA

Posts: 1
Shawryliak on May 4, 2017May 4th, 2017, 12:16 am EDT
I going to be tying a lot of these! THANKS!
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on May 5, 2017May 5th, 2017, 12:07 pm EDT
I going to be tying a lot of these! THANKS!

Yeah, right.

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