American Black Duck vs Blue-winged Goose
Anas rubripes comparado con Cyanochen cyanoptera
Side-by-Side Comparison
| Atributo | American Black Duck | Blue-winged Goose |
|---|---|---|
| Nombre científico | Anas rubripes | Cyanochen cyanoptera |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Near Threatened |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 65,2 cm (25.7 in) |
| Peso | 1211,25 g (42.73 oz) | 1796,25 g (63.36 oz) |
| Dieta | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Eats aquatic plants, seeds, and invertebrates; dabbles in shallow ponds; diet shifts toward invertebrates in … |
| Tamaño de la puesta | 1-17 | 4-12 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Blue-winged 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.
Blue-winged Goose
Alpine and subalpine grasslands, riverbanks, and marshy meadows at 2,800–4,200 m on the Ethiopian Highlands. Grazes along stream and river margins. Strongly tied to highland wetlands near cold mountain streams.
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.
Blue-winged Goose
A soft, nasal bleating call from Ethiopian highland wetlands. The NT status and restricted Afroalpine range mean vocalizations are poorly documented in systematic detail.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Blue-winged Goose
Breeds in northern prairie wetlands; winters along the Atlantic and Gulf coasts of the United States.
Estado de conservación
American Black Duck
Blue-winged 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 …
Blue-winged Goose
Mostly dull gray-brown; head paler gray. Distinctive pale blue wing patch conspicuous in flight. Underparts slightly paler. Bill and legs pinkish-gray. Sexes similar. Endemic to Ethiopian highlands.
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.
Blue-winged Goose
El ganso aliazul etíope es un ganso de color gris-marrón con alas de color azul índigo llamativo visible en vuelo, siendo su rasgo más característico. Endémico de las montañas de Etiopía, habita en lagos de altitud, ríos de montaña y prados alpinos generalmente por encima de los 3.000 metros. Está clasificado como vulnerable, con una pequeña y decreciente población.