Which waterfowl birds are not protected by the Migratory Bird Treaty Act?

The choice that identifies domestic ducks and mute swans as not being protected by the Migratory Bird Treaty Act is correct because the Act specifically protects migratory birds that are wild and native to North America. Domestic ducks do not qualify as they are domesticated species and not considered part of the native migratory bird population. Similarly, mute swans, while they can be found in the wild, are often classified as non-native and are not protected under the treaty due to their status as introduced species in various regions.

This allows for management practices regarding these species to differ from those applied to wild migratory birds, which are subject to various conservation policies to ensure their populations remain sustainable. The Act was designed to safeguard birds that migrate across international borders, which does not extend to non-native or domesticated species.