Ruddy-headed Goose vs Black-headed Duck
Chloephaga rubidiceps 비교 대상 Heteronetta atricapilla
Side-by-Side Comparison
| 속성 | Ruddy-headed Goose | Black-headed Duck |
|---|---|---|
| 학명 | Chloephaga rubidiceps | Heteronetta atricapilla |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 65.1 cm (25.6 in) | 34.7 cm (13.7 in) |
| 체중 | 1756.8333333333333 g (61.97 oz) | 528.5 g (18.64 oz) |
| 식성 | Feeds on grasses, grain, and aquatic invertebrates; grazes farmland and freshwater margins; diet heavier in … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 산란 수 | 3-8 | 2 |
| Population Trend | — | — |
Habitat Comparison
Ruddy-headed Goose
Breeds on open tussock grasslands and moorland in Tierra del Fuego and the Falkland Islands. Mainland wintering population on Patagonian grasslands now critically small. Falkland Islands population relatively stable.
Song & Call Comparison
Ruddy-headed Goose
A high, whistled 'whee' from males and a cackling rattle from females. Calls similar to Ashy-headed Goose. Falkland Islands population; calls in open coastal grassland.
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
Ruddy-headed Goose
Breeds in the coastal tundra of Siberia; winters in Southeast Asia and Australia. Long-distance migrant along the East Asian flyway.
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
Ruddy-headed Goose
Black-headed Duck
How to Tell Them Apart
Ruddy-headed Goose
Distinctive rufous-brown head and neck; body barred rufous and black above; underparts buff-white finely barred. Orange-yellow legs. White wing patches in flight. Compact; sexes similar. Falklands and Patagonia.
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
Ruddy-headed Goose
풍성한 적갈색-갈색 머리와 목, 황-흰색 배를 가진 소형 쉘드거위. 파타고니아와 포클랜드 제도 서식. 취약종. 초식성.
Black-headed Duck
검은머리오리(Heteronetta atricapilla)는 남아메리카산 약 530g의 소형 잠수 오리로, 오리과의 유일한 탁란성 종이다. 다른 수조류 둥지에 알을 낳는다.