Black-headed Duck vs Australian Shelduck

Heteronetta atricapilla comparado con Tadorna tadornoides

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Side-by-Side Comparison

Atributo Black-headed Duck Australian Shelduck
Nombre científico Heteronetta atricapilla Tadorna tadornoides
Orden Anseriformes Anseriformes
Familia Anatidae Anatidae
Estado de conservación Least Concern Least Concern
Longitud
Envergadura 34,7 cm (13.7 in) 70,7 cm (27.8 in)
Peso 528,5 g (18.64 oz) 1424,5 g (50.25 oz)
Dieta Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … Dabbles for aquatic invertebrates, seeds, and plant material in spring; forages in shallow ponds; diet …
Tamaño de la puesta 2 5-19
Population Trend
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Habitat Comparison

Hábitats compartidos

Black-headed Duck only

Ninguno

Australian Shelduck only

Australian Shelduck

Inland salt lakes, ephemeral lakes, estuaries, coastal bays, and agricultural dams in southern Australia from Queensland west to Western Australia. Nests in burrows, hollow logs, and tree cavities.

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Song & Call Comparison

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.

Australian Shelduck

Canto

Male gives a whistling 'zzzeet'; female gives a loud, deep cackling 'uk-uk-uk'. Loud, far-carrying calls from Australian wetlands. Considered one of the noisier shelducks.

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Geographic Range & Migration

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.

Australian Shelduck

Breeds across the Palearctic from Iceland and western Europe east to Siberia; winters in Africa, South Asia, and Southeast Asia.

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Estado de conservación

Least Concern

Black-headed Duck

Least Concern

Australian Shelduck

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How to Tell Them Apart

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.

Australian Shelduck

Plumaje

Males dark chestnut with black head showing green gloss; white neck collar. White inner wing with iridescent green speculum. Females have white eye-ring and white facial area. Chestnut breast; black …

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About These Birds

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.

Australian Shelduck

El tarro australiano es un grande pato de Australia con la cabeza de color negro verdoso en el macho y el ojo y la base del pico blancos en la hembra. El cuerpo es de color castaño rojizo con marcas alares blancas y negras. Habita en humedales abiertos, lagos y embalses en el sur de Australia, incluyendo Tasmania. Pasta hierba como los gansos, alejándose frecuentemente del agua.

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