After spending more than three years collecting, identifying, and studying spinners in the fertile and famous trout areas of Montana, Michigan, Idaho, and Yellowstone National Park, Sylvester Nemes designed more than thirty spinner fly patterns. From a miniature Trico to the gigantic Michigan Hex, they are all quick and easy to tie. It includes adult mayflies' dates of appearance, moulting and mating habits, and colours, shapes, and sizes as well as instructions on tying Syl's Gold Plated Spinner and Syl's Gold Tail Spinner.