(Click any of the following images for enlargement) The CDC Bubble Wing Caddis is a pattern I've constantly been tinkering with for the last five years.  Testing it using different hair dubbing, variegated hair, and combining hackles that mingle with dubbing loops. I have found over the years that the quill body contrasts nicely with this very impressionistic profile and geometry. Using a combination of techniques with squirrel, fox, beaver, and hackle, I have developed an adult Caddis pattern that pays big dividends in moderate- to fast-water applications. There are many versions of this fly, but as requested by a handful of my readers, here are profile shots of this tiny morsel on a #18 TMC 531. This fly also keels phenomenally tied on the Tiemco 206BL. It's a very “stable” fly in that it sits perfectly in the surface film, especially when tied in tandem with a fused hackle collar, as seen in the photos. Above photo: Drawing the thread to the rear after initially hackling, I...