Find This Bird
Look for American Black Ducks in both fresh and saltwater in eastern North America, where they will look like female Mallards except with an olive-yellow bill and overall darker, higher-contrast plumage. They prefer protected bodies of water such as saltmarshes and ponds, and frequently mix with other species of ducks, especially Mallards. Among flocks of Mallards, look for a darker, colder-toned duck of similar size; in flight, the white underwings of American Black Ducks form a brighter, more contrasting flash than on a flying Mallard. Because these two species frequently hybridize in eastern North America, be aware that you may see individuals with intermediate characters, such as a dark body and a partially green head.