Fly tying material can be anything used to construct a fly on a hook. Traditional materials were threads, yarns, furs, feathers, hair, tinsels, cork, balsa and wire. Today’s materials include not only all sorts of natural and dyed furs, hair and feathers, but also a wide array of synthetic materials. Rabbit, mink, muskrat, fox, bear, squirrel and other furs, deer, elk, moose hair and chicken, pheasant, turkey, duck, goose and partridge feathers are commonly incorporated into artificial flies. Chicken neck and saddle hackle, so essential for many artificial fly patterns, are from animals especially bred to produce hackles of superior performance and colour. Synthetics have allowed fly tyers to replicate rare and sometimes endangered furs and feathers as well as create completely new types of flies. Synthetics such as rubber legs, plastic wings and transparent plastic cords, chenilles, and all sorts and colours of flashy materials that can be incorporated into the wings and bodies of today’s artificial fly are available to the 21st-century fly tyer. Whereas lead wire was the traditional method of weighting flies, today’s weighting materials include glass, brass and tungsten beads and cones as well as lead. Silicone, epoxy, kevlar thread and other modern materials are regularly incorporated in artificial fly patterns