American Black Duck vs Cape Barren Goose
Anas rubripes ile kıyaslandığında Cereopsis novaehollandiae
Side-by-Side Comparison
| Özellik | American Black Duck | Cape Barren Goose |
|---|---|---|
| Bilimsel Ad | Anas rubripes | Cereopsis novaehollandiae |
| Takım | Anseriformes | Anseriformes |
| Familya | Anatidae | Anatidae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 53,4 cm (21.0 in) | 94,2 cm (37.1 in) |
| Ağırlık | 1211,25 g (42.73 oz) | 3816,6666666666665 g (134.63 oz) |
| Beslenme | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Grazes aquatic vegetation and submerged plants; largest Southern Hemisphere swan; winters on estuaries eating eelgrass … |
| Kuluçka Büyüklüğü | 1-17 | 3-6 |
| Population Trend | — | — |
Habitat Comparison
Ortak Yaşam Alanları
American Black Duck only
Cape Barren Goose only
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.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Cape Barren Goose
Breeds in northern North America; winters in the Great Basin, Great Plains, and coastal areas of the contiguous United States.
Koruma Durumu
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
A large pale grey goose with a distinctive lime-green cere at the base of its short dark bill and pink legs. Endemic to southern Australia. Grazes on grasses and low scrub on offshore islands. Territorial and aggressive; pairs hold year-round territories. Can survive without fresh water.