American Black Duck vs Andean Goose
Anas rubripes comparado con Chloephaga melanoptera
Side-by-Side Comparison
| Atributo | American Black Duck | Andean Goose |
|---|---|---|
| Nombre científico | Anas rubripes | Chloephaga melanoptera |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 86,3 cm (34.0 in) |
| Peso | 1211,25 g (42.73 oz) | 2617,5 g (92.33 oz) |
| Dieta | -- | Eats grasses, seeds, molluscs, and aquatic invertebrates; wades in shallow water; diet includes invertebrates year-round. |
| Tamaño de la puesta | 1-17 | 5-10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
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.
Estado de conservación
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
El pato negro americano es un gran pato de color marrón muy oscuro con una cabeza más clara y un llamativo espéculo alar púrpura. Habita en humedales del este de Norteamérica y se está hibridando cada vez más con el pato de collar introducido en su rango, lo que representa una amenaza para su pureza genética. Prefiere marismas costeras, pantanos boscosos y lagos tranquilos.
Andean Goose
La guayata o ganso andino es un ganso de los Andes que habita en los páramos y el altiplano desde el sur de Perú hasta el norte de Chile y Argentina, a menudo por encima de los 4.500 metros. Tiene plumaje casi completamente blanco con las alas de color negro brillante. Es el ganso que vive a mayor altitud en el mundo, tolerando condiciones de frío y baja presión de oxígeno extremas.