Is there a such thing as black duck?

Yes, the American Black Duck (Anas rubripes) is a species of dabbling duck found in North America. It is a medium-sized duck with a dark brown or blackish body, a white belly, and a greenish-yellow bill. The American Black Duck is found in marshes, swamps, and other wetlands in the eastern United States and Canada. It is a migratory bird, and winters in the southern United States and Mexico.