The balance, performance and aesthetics of a quality dry fly is optimized by resilient, glossy, natural tailing fibers. Yet good quality natural tailing material has become increasingly hard to find. Whiting Farms has developed the CDL Mayfly Tailing Pack to provide exceptionally good tailing fibers. These feathers come from Coq-de-Leon roosters, and are meant to tie tails for both dry flies and nymphs.