American Black Duck vs Andean Goose
Anas rubripes в сравнении с Chloephaga melanoptera
Side-by-Side Comparison
| Характеристика | American Black Duck | Andean Goose |
|---|---|---|
| Научное название | Anas rubripes | Chloephaga melanoptera |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 53,4 cm (21.0 in) | 86,3 cm (34.0 in) |
| Масса | 1211,25 g (42.73 oz) | 2617,5 g (92.33 oz) |
| Питание | -- | Eats grasses, seeds, molluscs, and aquatic invertebrates; wades in shallow water; diet includes invertebrates year-round. |
| Размер кладки | 1-17 | 5-10 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
American Black Duck only
Andean Goose only
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Andean Goose
High-altitude puna grassland, bofedales (cushion bogs), and lakeshores at 3,500–5,500 m in the Andes from Peru through Bolivia and Chile to northwestern Argentina. Grazes beside glacial and alpine lakes.
Song & Call Comparison
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Andean Goose
A loud, cackling 'kek-kek-kek' from high-altitude Andean puna. Pairs are territorial and vocal. Calls carry well across open altiplano above 4,000 m elevation.
Geographic Range & Migration
American Black Duck
Andean Goose
Formerly widespread on the Mascarene Island of Réunion. Extinct in the 17th century; extirpated by hunting and introduced predators.
Охранный статус
American Black Duck
Andean Goose
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
Andean Goose
Entirely white plumage except black-tipped primaries and black tail. Bill and legs coral-pink. Larger than most Chloephaga. Sexes similar. Inhabits high Andean lakes and grasslands above 3,000 m.
About These Birds
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.
Andean Goose
A large white-and-black sheldgoose with a distinctive black-tipped pink-and-black bill, bright pink legs, and black wings. Endemic to high Andean puna. One of the highest-living birds in the Americas; found beside glacial lakes and streams. Monogamous; highly territorial during breeding.