Cape Barren Goose vs Black-headed Duck
Cereopsis novaehollandiae comparado con Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Cape Barren Goose | Black-headed Duck |
|---|---|---|
| Nombre científico | Cereopsis novaehollandiae | Heteronetta atricapilla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 94,2 cm (37.1 in) | 34,7 cm (13.7 in) |
| Peso | 3816,6666666666665 g (134.63 oz) | 528,5 g (18.64 oz) |
| Dieta | Grazes aquatic vegetation and submerged plants; largest Southern Hemisphere swan; winters on estuaries eating eelgrass … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| Tamaño de la puesta | 3-6 | 2 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Cape Barren Goose only
Black-headed Duck only
Ninguno
Cape Barren Goose
Open grasslands, heathlands, and low scrub on offshore islands and coastal mainland of southern Australia. Grazes in open areas. Nests on the ground. Largely sedentary with some mainland movements in winter.
Song & Call Comparison
Cape Barren Goose
A loud, grunting 'honk-honk' from both sexes. The Cape Barren Goose gives pig-like grunting and cackling sounds. Not musical; its calls are distinctive but harsh.
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.
Geographic Range & Migration
Cape Barren Goose
Breeds in northern North America; winters in the Great Basin, Great Plains, and coastal areas of the contiguous United States.
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.
Estado de conservación
Cape Barren Goose
Black-headed Duck
How to Tell Them Apart
Cape Barren Goose
Pale ash-gray plumage with small dark spots on wing coverts. Head whitish-gray. Bill short with prominent lime-green cere. Legs and feet pinkish-red. Sexes similar; one of few native Australian geese.
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.
About These Birds
Cape Barren Goose
El ganso de Nueva Holanda o pato ceniciento es un ganso endémico de Australia con plumaje gris con manchas negras en las alas y el dorso. Es inusual entre los gansos por tener el pico pequeño y amarillo verdoso con la punta negra. Habita en islas y costas del sur de Australia, donde pasta hierba en grupos. Tiene una larga esperanza de vida para un ave de su tamaño.
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.