CDC (cul-de-canard) feathers are one of the most popular fly-tying materials. CDC's water-resistant properties make it particularly useful for tying dry flies, emergers, and nymphs, especially in small sizes. Tying Flies with CDC brings together the CDC patterns and tying techniques of creative, innovative fly tiers from around the world. The book has background on CDC, how it was used in the past and how it is used today, and tips on fishing with CDC flies.