Emperor Goose vs Black-headed Duck
Anser canagicus 비교 대상 Heteronetta atricapilla
Side-by-Side Comparison
| 속성 | Emperor Goose | Black-headed Duck |
|---|---|---|
| 학명 | Anser canagicus | Heteronetta atricapilla |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 74.8 cm (29.4 in) | 34.7 cm (13.7 in) |
| 체중 | 2300.45 g (81.15 oz) | 528.5 g (18.64 oz) |
| 식성 | Grazes aquatic plants and terrestrial grasses; upends in shallow water; winter diet shifts toward grain … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 산란 수 | 1-8 | 2 |
| Population Trend | — | — |
Habitat Comparison
Emperor Goose
Breeds on coastal tundra near the Bering Sea in Alaska and Chukotka. Winters on rocky coastal shorelines, kelp beds, and intertidal flats along the Aleutian Islands and Alaska Peninsula.
Song & Call Comparison
Emperor Goose
A low, nasal 'clag-clag' call. Less vocal than other Anser geese. Gives contact calls in flocks during Arctic breeding and Pacific coast wintering. Somewhat quiet.
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
Emperor Goose
Breeds in the eastern Arctic of Canada; winters along the Atlantic coast from Newfoundland to Florida and occasionally to Texas.
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
Emperor Goose
Black-headed Duck
How to Tell Them Apart
Emperor Goose
Body plumage blue-gray with black and white feather scalloping. White head and hindneck contrasting with dark throat. Orange-yellow legs. Bill pink-orange. Tail white. Adults striking; sexes similar.
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
Emperor Goose
황제 기러기는 알래스카와 시베리아 해안에서 번식합니다. 회색 몸통과 흰 머리, 검은 목이 특징이며, 조간대와 해안 초원에서 서식합니다. 개체 수가 제한적이고 감소 추세에 있습니다.
Black-headed Duck
검은머리오리(Heteronetta atricapilla)는 남아메리카산 약 530g의 소형 잠수 오리로, 오리과의 유일한 탁란성 종이다. 다른 수조류 둥지에 알을 낳는다.