Upland Goose vs Black-headed Duck

Chloephaga picta comparado con Heteronetta atricapilla

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Side-by-Side Comparison

Atributo Upland Goose Black-headed Duck
Nombre científico Chloephaga picta Heteronetta atricapilla
Orden Anseriformes Anseriformes
Familia Anatidae Anatidae
Estado de conservación Least Concern Least Concern
Longitud
Envergadura 82,4 cm (32.4 in) 34,7 cm (13.7 in)
Peso 2916,0 g (102.86 oz) 528,5 g (18.64 oz)
Dieta Grazes grasses and sedges; dabbles for aquatic invertebrates; diet shifts between plant-heavy and invertebrate-heavy phases. Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet …
Tamaño de la puesta 5-8 2
Population Trend
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Habitat Comparison

Hábitats compartidos

Upland Goose only

Ninguno

Black-headed Duck only

Upland Goose

Open Patagonian grasslands, steppe, and agricultural pastures in southern Chile and Argentina, including the Falkland Islands. Grazes on short grass. Males aggressively defend territories. Partially migratory.

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Song & Call Comparison

Upland Goose

Canto

Male gives a high, whistled 'whew'; female gives a low, rolling cackle 'ga-ga-ga'. Sexual differences in call are pronounced. Falklands and Patagonian populations highly vocal.

Black-headed Duck

Canto

Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.

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Geographic Range & Migration

Upland Goose

Endemic to New Caledonia and its surrounding islands. Confined to dense rainforest; non-migratory and terrestrial year-round.

Black-headed Duck

Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.

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Estado de conservación

Least Concern

Upland Goose

Least Concern

Black-headed Duck

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How to Tell Them Apart

Upland Goose

Plumaje

Pronounced dimorphism. Males white with black-barred flanks and white wings with black primaries. Females rufous-brown with black-barred flanks and white belly. Both sexes yellow-orange legs. Grassland species.

Black-headed Duck

Plumaje

Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.

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About These Birds

Upland Goose

El cauquén común o ganso magallánico es un ganso del sur de América del Sur con marcado dimorfismo sexual: el macho es blanco con un barreado negro, y la hembra es de color castaño barrado. Habita en pastizales abiertos, campos cultivados y costas marinas desde el sur de Argentina y Chile hasta las Islas Malvinas. Es una especie abundante en la Patagonia.

Black-headed Duck

El pato cabeza negra es un pequeño pato buceador (~530 g) de América del Sur, familia Anatidae, y el único miembro del género Heteronetta. Tiene la cabeza negra en el macho y cuerpo marrón. Parásita de nido obligada: pone sus huevos en los nidos de otras aves acuáticas, especialmente fochas y pollas de agua. Habita en lagos y lagunas con vegetación emergente de Argentina, Bolivia, Brasil, Chile, Paraguay y Uruguay. No cría su propia cría nunca.

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