The possession of feathers and other parts of native North American birds without a permit is prohibited by the Migratory Bird Treaty Act (MBTA). This protects wild birds by preventing their killing by collectors and the commercial trade in their feathers, and extends to all feathers, regardless of how they were obtained. There is no exemption for molted feathers or those taken from road- or window-killed birds. More information on the Migratory Bird Treaty Act, and the list of MBTA-protected species can be found here.