So, from the other thread, it appears it was years ago that Matt shared his dun pattern with me. It's now my favorite, and the only one I have solid confidence in. I did create an emerger pattern some years back, and have caught a few fish on it, but I'll tie on Matt's pattern first. I looked to see if I'd saved any notes on my emerger, and haven't. Here's the idea: use a Daiichi 1130 hook or similar scud hook in the proper size. Use 14/0 Veevus brown thread. Use dark brown very fine dubbing. Tie in a tail of some brown wet fly fibers and dub a very thin abdomen. Tie in a longish black spinner wing of poly yarn where the abdomen ends. Dub a thorax in front of the spinner wing leaving 2 hook eye lengths bard just behind the hook eye. Tie in a short wing of fine snowshoe fur just in front of the thorax, then pull the spinner wing tips forward to create a wingcase around the wing, tieing off the poly yarn at the eye. Whip finish and clip the extra poly yarn. I'm not sure that the wing case does anything but cause the tier extra trouble, but I do it anyway. I've used this pattern on other small mayflies a few times too.
Below is my parachute spinner, modeled on Al's trico. It's a bit more visible and has taken some picky fish. Colored post versions are very helpful in glare. The fish don't seem to mind them at all.
My standard Trico is based on Al's Trico. It lets me get an Al's Trico silhouette with a much more visible parachute fly. For all my Tricos I use a short shank hook, (Tiemco 500U, Tiemco 2488, Tiemco 921, Daichi 1640, or best of all. if you can find them, a Varivas 2300). I begin by winding two or three layers of 10/0 thread on the shank for the abdomen (black for males, white, green, or chartreuse for females. With females, I whip finish the thread, then tie in black just at the bend and finish with black thread), I tie in a white high vis post near the bend. Other materials may be used, and black, pink or orange posts can sometimes better be seen in glare. I use Gary Borger's method, slipping the high vis under the shank and pulling both ends up to create a post that can't pull out. A few X wraps under the hook to secure the post, a tiny drop of super glue at the base and some more quick X wraps and posting wraps at the base of the post and up a bit, and the post is ready and won't slip around later. Then I strip some barbs from an oversize grizzly hackle, tie in it in along the shank and then wrap the stem up the post to to reinforce and stiffen the post. Next I wrap a small ball of black dubbing for the thorax, wrap the hackle around the post and tie off. (I wrap clockwise and when done, trap the hackle stem with the thread under the wraps, and with the hackle tip pulled straight down by the hackle pliers, whip finish using a whip finish tool under the hackle on the post with a few wraps--usually 3. A ultra-mini drop of gorilla glue on the thread of the final whip finish loop that is going to be pulled into the knot is pulled in from below, avoiding the hackle, to lock it all in permanently.)
Or you can wrap the parachute counter-clockwise and tie off on the shank, just behind the thorax, whip finishing along the shank.) Finally, if you wish (though I’ve stopped doing this for tiny flies), snip off some hackle barbs just above the eye and the shank to create the illusion of two wings to the sides, and your’re done. That’s right. No tails. The high vis post makes the fly much easier to see than Al's Trico, and it can be left long or trimmed/flattened if the fish seem to mind it. I haven't noticed that they do mind the post, though some fish seem to want a different style of fly sometimes. Hard fished Spring Creek trout in State College took the parachute readily when I tried it on them. It's often the first pattern I tie on, switching around to other styles if the fish won't take it. The parachute Trico can be used as a midge imitation also. I use this pattern, reverse style as above, or with the parachute near the eye for larger spinners as well, though I do add tails for these usually.
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell