Andean Goose
Chloephaga melanoptera
The Andean goose is 70 to 76 cm (28 to 30 in) long and weighs 2.73 and 3.64 kg (6.0 and 8.0 lb). Both sexes have the same plumage. Adults' heads and bodies are white. Some scapulars have sooty centers and others are dark brown, giving a striped appearance to the shoulders. The wing's primaries and the tail are black with a greenish gloss. Their bill is coral red with a black nail and the legs and feet are light red. Downy young are mostly white with some blackish spots and streaks. Older immatures are similar to adults but duller. Voice: The Andean goose is very vocal, and males and females have very different voices. Males make "a "soft huit-wit-wit..., crip, quiop, low, grunting kwwwwwu..., single-syllable threat whistle, and double-syllable sexual calls." Females make a louder "somewhat grating kwa-kwak and "a hoarse gack-gack".
ID text from Wikipedia, CC BY-SA 4.0
Upland Goose
Chloephaga picta
Upland geese males are similar to other sheldgeese, notably the kelp goose (Chloephaga hybrida) due to their predominantly white plumage, while females resemble the ruddy-headed goose (C. rubidiceps) due to their similarly barred breast plumage. This species is 60–72.5 centimetres (23.6–28.5 in) long. Greater Magellan geese (leucoptera subspecies) are the largest birds of the genus Chloephaga. Males typically weigh 3.5–4.5 kg (7.7–9.9 lbs) and females range from 2.9 to 3.5 kg (6.4–7.7 lbs). Lesser Magellan geese (picta subspecies) males weigh 2.7–3.6 kg (6.0–7.9 lbs) on average and females 2.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Andean Goose and Upland Goose.