Black Scoter
Melanitta americana
This large sea duck is characterised by its bulky shape and large bill. The adult male is all black with a very bulbous bill which is mostly yellow. The female is a brown bird with pale cheeks, very similar to female common scoter. The adult female averages about 980 g (2.16 lb) and 45 cm (18 in) in length, while the adult male is on average 1,100 g (2.4 lb) and 49 cm (19 in) in length. This species can be distinguished from other scoters, apart from common scoter, by the lack of white anywhere on the drake, and the more extensive pale areas on the female. Voice: The black scoter and common scoter have diagnosably distinct vocalisations.
ID text from Wikipedia, CC BY-SA 4.0
Muscovy Duck
Cairina moschata
It is a large duck, with the males significantly larger than the females. The males are 76–84 cm (30–33 in) long and weigh up to 3–4 kg (6.6–8.8 lb); females are 71–76 cm (28–30 in) long and 1.25 kg (2.8 lb) weight, roughly half the weight of the males. The wingspan is from 137 to 152 cm (54 to 60 in). The plumage is predominantly black, with large white patches on the wing; the back and wing feathers being iridescent and glossy in males, while the females are more drab. Muscovy ducks have long claws on their feet and a wide, flat tail. On the head, the male has a short crest on the nape.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in BeakBrain
Photo and call practice, free in any browser.
Play BeakBrainPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black Scoter and Muscovy Duck.