Yellow-billed Duck vs Black Swan
Anas undulata 비교 대상 Cygnus atratus
Side-by-Side Comparison
| 속성 | Yellow-billed Duck | Black Swan |
|---|---|---|
| 학명 | Anas undulata | Cygnus atratus |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | 130.0 cm (51.2 in) |
| 날개 폭 | 48.1 cm (18.9 in) | 190.0 cm (74.8 in) |
| 체중 | 907.6666666666666 g (32.02 oz) | 6200.0 g (218.70 oz) |
| 식성 | Dives for fish, frogs, and aquatic invertebrates; uses serrated bill to grip prey; diet shifts … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| 산란 수 | 4-12 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Yellow-billed Duck
Freshwater lakes, rivers, marshes, and dams across eastern and southern Africa from Ethiopia and Uganda south to the Cape. Tolerates agricultural impoundments and urban wetlands. Largely sedentary.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Yellow-billed Duck
Female gives a loud, descending quacking series; male utters a soft, raspy rehb note. The female's strong quacking call is the dominant sound at sub-Saharan African wetlands.
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
Geographic Range & Migration
Yellow-billed Duck
Found across sub-Saharan Africa from Senegal to Ethiopia and south to South Africa. Sedentary in freshwater wetlands.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
보전 상태
Yellow-billed Duck
Black Swan
How to Tell Them Apart
Yellow-billed Duck
Brown body with scaly pale-edged feathers; head brown with paler face and throat. Diagnostic bright yellow bill with black central stripe. Iridescent green-and-black speculum with white borders. Sexes similar.
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
About These Birds
Yellow-billed Duck
노란부리 오리는 동아프리카와 남아프리카에 서식하는 중간 크기의 오리입니다. 황색 부리와 갈색 반점의 몸통이 특징이며, 고도가 높은 호수와 습지를 선호합니다.
Black Swan
검은 백조는 한때 모든 백조가 흰색이라고 믿었던 유럽인들에게 불가능하다고 여겨졌으며, 귀납적 추론 실패의 유명한 철학적 예가 됩니다. 서부 오스트레일리아의 주 새입니다. 검은 백조는 평생 짝 유대를 형성하며 양 부모가 포란과 새끼 양육을 공유합니다.