Black-headed Duck vs Blue Duck
Heteronetta atricapilla 비교 대상 Hymenolaimus malacorhynchos
Side-by-Side Comparison
| 속성 | Black-headed Duck | Blue Duck |
|---|---|---|
| 학명 | Heteronetta atricapilla | Hymenolaimus malacorhynchos |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Endangered |
| 체장 | — | — |
| 날개 폭 | 34.7 cm (13.7 in) | 45.6 cm (18.0 in) |
| 체중 | 528.5 g (18.64 oz) | 861.75 g (30.40 oz) |
| 식성 | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … | Eats aquatic invertebrates, seeds, and plant material; dabbles in shallow fresh water; invertebrate diet peaks … |
| 산란 수 | 2 | 5-6 |
| Population Trend | — | — |
Habitat Comparison
Blue Duck
Fast-flowing clear turbulent mountain rivers and streams in pristine native forest at 300–1,500 m in both main islands of New Zealand. Requires undisturbed riparian habitat with abundant aquatic invertebrates.
Song & Call Comparison
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.
Blue Duck
A soft, musical whistle from fast-flowing South Island rivers. Call is a clear 'whio' — giving the bird its Maori name. Also gives a soft, reedy 'squeak'. Endangered; rarely heard.
Geographic Range & Migration
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.
Blue Duck
Breeds on open prairie wetlands of the Great Plains; winters in shallow estuaries and marshes along the Gulf of Mexico.
보전 상태
Black-headed Duck
Blue Duck
How to Tell Them Apart
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.
Blue Duck
Distinctive slate-blue-gray plumage; breast spotted with chestnut-brown in both sexes. Pale bill with flexible pink lobes at tip. Chestnut eye. Sexes similar; adapted to fast-flowing mountain streams in New Zealand.
About These Birds
Black-headed Duck
검은머리오리(Heteronetta atricapilla)는 남아메리카산 약 530g의 소형 잠수 오리로, 오리과의 유일한 탁란성 종이다. 다른 수조류 둥지에 알을 낳는다.
Blue Duck
청둥오리부리오리는 뉴질랜드의 고유종으로 빠른 산악 하천에 서식한다. 독특한 회색빛 깃털과 분홍색 부리 끝이 특징적이다. 하천의 이끼와 조류를 먹으며 뉴질랜드에서만 발견되는 귀중한 토착종이다.