American Black Duck vs Cape Barren Goose
Anas rubripes 对比 Cereopsis novaehollandiae
Side-by-Side Comparison
| 属性 | American Black Duck | Cape Barren Goose |
|---|---|---|
| 学名 | Anas rubripes | Cereopsis novaehollandiae |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 53.4 cm (21.0 in) | 94.2 cm (37.1 in) |
| 体重 | 1211.25 g (42.73 oz) | 3816.6666666666665 g (134.63 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-17 | 3-6 |
| Population Trend | — | — |
Habitat Comparison
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
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
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
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.
保护状况
American Black Duck
Cape Barren Goose
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
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.
About These Birds
American Black Duck
A large dark brown dabbling duck closely resembling a very dark female Mallard, with purple speculum, yellowish-olive bill in males, and orange legs. Common in eastern North America. Hybridizes freely with Mallard; pure populations declining in the interior.
Cape Barren Goose
鹤形鹅 (Cereopsis novaehollandiae)，体长约75–100厘米。体羽灰色，翅膀灰褐色，腿暗红色，嘴短而弯曲呈黄绿色。特有于澳大利亚南部沿海岛屿。以草和植物性食物为食，与其他雁鹅不同，几乎完全陆栖。