To practice casting, you need a simple, snag-free, bombproof, and highly visible practice fly. You can tie this one using #18 Braided Mason Twine available at most home improvement stores. Use this fly with targets such as Frisbees turned upside down with water in them to ensure fun, and productive, practice sessions.
1. Remove approximately 4 inches of twine from the spool, fold in half, and cut.
2. Make approximately 25 tight wraps of Danville 210-denier flat waxed thread and whip-finish.
3. Coat the thread wraps with Loctite Super Glue Gel Control (or similar).
4. Comb the fibers with a fine-tooth dog brush, or tease them out with a bodkin.
5. Tie a loop knot (I use a perfection loop) in the end of your leader, and attach the practice fly with a loop-to-loop connection. Joe Mahler - Ft. Myers Florida
Illustration by Joe Mahler, joemahler.com