A secondary benefit of hunting waterfowl is the collection of choice feathers for steelhead fly tying. Duck flank feathers are often used throats or wrapped collar hackles. Mallard flank feathers are light grey with faint dark barring. American widgeon suppy flank feathers that are barred and of a rosy-tan color. The bronze feathers from the back of the mallard drake supply the necessary plumes for the characteristic strip wings of Spey flies like this Lady Caroline. Prized bronze mallard plumes are eagerly sorted and paired for the creation of great wings.