Hmmm. Just a note back there in my admittadly failing memory banks about how many old timers there were that fished the U.S. and thats it. Day in and day and caught fish . Now that I am back down here, and I can only have 12, I would go with that and the Intruders or type of. The fly I fish and dress is similar to those but tyed with some different materials, but certainly along the same lines of. 'Course we used to only fish floating lines and smaller patterns and still caught fish, now we atleast seem to need to get deeper, how deep is debated for sure, and use much larger flies as a rule, or should we say huge???? Some of the "whys" kind of referred to here are parts of many ongoing studies.Why won't the fish in the Umpqua not come up to a fly so readily anymore. Pressure? Some say to a degree there is less pressure now on the fish than then there. I saw some of that this fall on the smaller streams here in the valley. Fish that used to move to a swung crickdaddie pattern now don't It does seem basic black and primarily black flies are fished more up there though, especially in winter. See? another why? Maybe a couple.