Black-headed Duck vs Australian Shelduck
Heteronetta atricapilla comparado con Tadorna tadornoides
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 | — | — |
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.
Song & Call Comparison
Black-headed Duck
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
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.
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.
Estado de conservación
Black-headed Duck
Australian Shelduck
How to Tell Them Apart
Black-headed Duck
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
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 …
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.