Mallard vs American Black Duck

In short

Mallards and American Black Ducks are similar in size and shape but differ in plumage. Mallards have a distinctive iridescent green head in males, while American Black Ducks are darker and more uniformly colored. Both species can be found in overlapping habitats, but their vocalizations differ slightly.

Identification tips

• Look for the green head and white neck ring in male Mallards.
• Note the uniform dark plumage of American Black Ducks.
• Check the bill color: orange with black for female Mallards, dark for American Black Ducks.
• Listen for the nasal quality in the American Black Duck's call compared to the Mallard's quack.

Size

Both species are similar in size, with the Mallard being slightly more robust.

Plumage

Male Mallards are easily identified by their iridescent green head, white neck ring, and chestnut-brown breast. Female Mallards are mottled brown with an orange bill marked with black. American Black Ducks are generally darker, with a uniformly dark brown body and a slightly lighter head. Both sexes of the American Black Duck have a dark bill.

Behaviour

Both species exhibit similar behaviors, often seen dabbling in water or foraging on land.

Habitat

Mallards are highly adaptable, found in a variety of habitats including urban areas, while American Black Ducks prefer more secluded wetlands. Both can overlap in marshes and coastal areas.

Voice

Mallards have a classic quacking sound, while American Black Ducks have a similar but slightly more nasal call.