Barrow's Goldeneye
Bucephala islandica
Adults are similar in appearance to the common goldeneye. On average, adult males are 49 cm (19.2 in) long and weigh 0.97 kg (2.13 lb); females are typically 43 cm (17 in) long and weigh 0.59 kg (1.31 lb). The Barrow's goldeneye has a wingspan of 70–73 cm (28–29 in). Adult males have a dark head with a purplish gloss and a white crescent at the front of the face. Adult females have a mostly yellow bill. Voice: The Barrow's goldeneye is a relatively quiet bird that generally only makes vocalizations during the breeding season and courtship. These can include low volume squeaks, grunts and croaks. During flights, the fast movement of the bird's wings creates a low whistling sound.
ID text from Wikipedia, CC BY-SA 4.0
Smew
Mergellus albellus
The smew is 38–44 cm (15–17 in) long, with a wingspan of 56–69 cm (22–27 in), and a weight of 450–650 g (16–23 oz). Adult drake smew, with its 'cracked ice' or 'panda' appearance, is unmistakable, and looks very black-and-white in flight. The females and immature males are grey, with chestnut forehead and crown, white chin and cheeks, and black lores; they are often known as "redhead" smew.
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: Barrow's Goldeneye and Smew.