The down wing dry fly style is a perfect match for one of the most ubiquitous insects found in trout rivers across the planet: caddis. The down wing platform is also a first choice for matching many terrestrials, like moths and hoppers, and it finds it's way to stonefly patterns as well. But for this discussion, we cover the down wing and its progression into fly boxes, by looking at three standouts: the Elk Hair Caddis, the X-Caddis and the CDC & Elk. Because the arrival of each of these...