Brent Goose vs Ashy-headed Goose
Branta bernicla comparado con Chloephaga poliocephala
Side-by-Side Comparison
| Atributo | Brent Goose | Ashy-headed Goose |
|---|---|---|
| Nombre científico | Branta bernicla | Chloephaga poliocephala |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 63,9 cm (25.2 in) | 69,1 cm (27.2 in) |
| Peso | 1335,0 g (47.09 oz) | 1779,25 g (62.76 oz) |
| Dieta | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … | Eats grasses, seeds, and aquatic invertebrates; grazes upland pastures and dabbles in wetlands; diet varies … |
| Tamaño de la puesta | 1-10 | 4-6 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Brent Goose only
Ninguno
Ashy-headed Goose only
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.
Ashy-headed Goose
Temperate forests, forest clearings, and lake margins in southern Chile and Patagonian Argentina. Partially migratory; breeds in beech forest zones and winters on open grasslands farther north.
Song & Call Comparison
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.
Ashy-headed Goose
A whistled 'seeeeu' from males and a lower cackling from females. Ashy-headed Goose calls carry across Andean foothills and Patagonian grassland habitats.
Geographic Range & Migration
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Ashy-headed Goose
Inhabits wetlands and flooded grasslands across South and Southeast Asia, from India to Indonesia. Largely resident year-round.
Estado de conservación
Brent Goose
Ashy-headed Goose
How to Tell Them Apart
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.
Ashy-headed Goose
Gray head and neck contrast with chestnut breast and rufous-barred flanks. Back brown; belly white. White wing patch in flight with iridescent green speculum. Yellow-orange legs. Sexes similar but females …
About These Birds
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.
Ashy-headed Goose
El cauquén real es un ganso del sur de América del Sur que habita en pastizales andinos y patagónicos desde Chile hasta Argentina. Tiene la cabeza gris, el cuerpo barrado de negro y blanco, y las alas con partes blancas y negras muy llamativas. Es una especie migratoria que durante el invierno desciende a menores altitudes y se desplaza hacia el este de la Patagonia.