Cape Barren Goose vs Black-headed Duck
Cereopsis novaehollandiae comparado com Heteronetta atricapilla
Side-by-Side Comparison
| Atributo | Cape Barren Goose | Black-headed Duck |
|---|---|---|
| Nome científico | Cereopsis novaehollandiae | Heteronetta atricapilla |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| 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 … |
| Tamanho da postura | 3-6 | 2 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Cape Barren Goose only
Black-headed Duck only
Nenhum
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 conservação
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
Ganso-de-Céreopsis (Cereopsis novaehollandiae), 75–100 cm. Grande ganso cinzento com píleo claro, bico curto e verde-amarelado com ponta negra, pernas vermelhas. Habita pastagens e campos costeiros do sul da Austrália e ilhas adjacentes. Alimenta-se principalmente de ervas e plantas aquáticas. Nidifica no solo.
Black-headed Duck
O pato-parasita-de-cabeça-preta é um pato único da América do Sul que é um parasita de ninho obrigatório, não construindo o seu próprio ninho. Põe ovos exclusivamente nos ninhos de outros patos, principalmente patos de cauda rígida e macaquinhos-do-pântano. Os machos têm cabeça preta característica e corpo acastanhado. Habita zonas húmidas de água doce na Argentina, Uruguai, sul do Brasil e Chile. As fêmeas têm ovários altamente desenvolvidos e podem pôr muitos ovos ao longo de uma temporada.