This months fly pattern is the Stimulator. You can be pretty inventive with your choice of materials and colors for this pattern. I’ve tied mine to mimic the adult salmonfly bug that will soon be hatching on the Rogue River. Just be sure you select materials for the fly that will help it float. The longer the better. The two flies to the right, with the black and white wings, I tested just yesterday. The wings and tail are of calf. The body material is poly yarn. I dressed the wings and tail of the flies with lip balm. Happily I was able to jerk the flies underwater on their drift downstream, and they would pop right back up to float merrily on. I can see a many trout, and maybe an early summer steelhead or two, succumbing to all these pattern in a month or so on the Rogue River.