Yellow-billed Duck vs Brent Goose
Anas undulata comparado con Branta bernicla
Side-by-Side Comparison
| Atributo | Yellow-billed Duck | Brent Goose |
|---|---|---|
| Nombre científico | Anas undulata | Branta bernicla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 48,1 cm (18.9 in) | 63,9 cm (25.2 in) |
| Peso | 907,6666666666666 g (32.02 oz) | 1335,0 g (47.09 oz) |
| Dieta | Dives for fish, frogs, and aquatic invertebrates; uses serrated bill to grip prey; diet shifts … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| Tamaño de la puesta | 4-12 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Yellow-billed Duck only
Ninguno
Brent Goose only
Yellow-billed Duck
Freshwater lakes, rivers, marshes, and dams across eastern and southern Africa from Ethiopia and Uganda south to the Cape. Tolerates agricultural impoundments and urban wetlands. Largely sedentary.
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Yellow-billed Duck
Female gives a loud, descending quacking series; male utters a soft, raspy rehb note. The female's strong quacking call is the dominant sound at sub-Saharan African wetlands.
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Geographic Range & Migration
Yellow-billed Duck
Found across sub-Saharan Africa from Senegal to Ethiopia and south to South Africa. Sedentary in freshwater wetlands.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Estado de conservación
Yellow-billed Duck
Brent Goose
How to Tell Them Apart
Yellow-billed Duck
Brown body with scaly pale-edged feathers; head brown with paler face and throat. Diagnostic bright yellow bill with black central stripe. Iridescent green-and-black speculum with white borders. Sexes similar.
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
About These Birds
Yellow-billed Duck
El pato de pico amarillo es un pato de tamaño mediano con plumaje marrón oscuro moteado y un pico amarillo con una dorsal negra, lo que le da su nombre común. Está ampliamente distribuido en África subsahariana, donde habita en una variedad de humedales, incluyendo lagos, ríos, marismas y embalses. Es una especie común y adaptable que tolera bien la alteración humana de su hábitat.
Brent Goose
El barnacla brenta o barnacla negruzca es un pequeño ganso marino de color negro y gris oscuro con un pequeño parche blanco a los lados del cuello. Cría en la tundra ártica y migra a zonas costeras templadas del hemisferio norte en invierno, donde se alimenta principalmente de zostera, un tipo de hierba marina. Es el único ganso que pasa el invierno en ambientes exclusivamente marinos.