Cape Barren Goose vs Black-headed Duck
Cereopsis novaehollandiae 비교 대상 Heteronetta atricapilla
Side-by-Side Comparison
| 속성 | Cape Barren Goose | Black-headed Duck |
|---|---|---|
| 학명 | Cereopsis novaehollandiae | Heteronetta atricapilla |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 94.2 cm (37.1 in) | 34.7 cm (13.7 in) |
| 체중 | 3816.6666666666665 g (134.63 oz) | 528.5 g (18.64 oz) |
| 식성 | 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 … |
| 산란 수 | 3-6 | 2 |
| Population Trend | — | — |
Habitat Comparison
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.
보전 상태
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
특이한 라임-녹색 납피부와 짧고 검은 부리를 가진 옅은 회색의 대형 기러기이다. 오스트레일리아 남부 해안 섬 고유종. 풀을 뜯어 먹으며 공격적인 성격으로 유명하다.
Black-headed Duck
검은머리오리(Heteronetta atricapilla)는 남아메리카산 약 530g의 소형 잠수 오리로, 오리과의 유일한 탁란성 종이다. 다른 수조류 둥지에 알을 낳는다.