We use lots of colorful tails on our nymphs, especially on Perdigons. They not only look super cool, but they are a HUGE trigger for fish. Our Dyed Coq De Leon Tail Feather packs come with 2 XL feathers, which is enough to tie hundreds of flies. If you want to try all the colors, check out the combo pack which comes with 2 of each colored feather.