Black-necked Swan vs Spotted Whistling-duck
Cygnus melancoryphus 비교 대상 Dendrocygna guttata
Side-by-Side Comparison
| 속성 | Black-necked Swan | Spotted Whistling-duck |
|---|---|---|
| 학명 | Cygnus melancoryphus | Dendrocygna guttata |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 82.4 cm (32.4 in) | 41.3 cm (16.3 in) |
| 체중 | 5275.0 g (186.07 oz) | 677.5 g (23.90 oz) |
| 식성 | Grazes aquatic plants and dabbles for invertebrates; diet includes seeds, roots, and aquatic invertebrates in … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 산란 수 | 4-8 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Black-necked Swan
Freshwater lakes, lagoons, rivers, estuaries, and coastal wetlands in southern South America from central Chile and Argentina to Tierra del Fuego. Partially migratory; concentrates at coastal estuaries in winter.
Spotted Whistling-duck
Freshwater wetlands, rice fields, streams, and forest pools in New Guinea, Sulawesi, the Philippines, and Moluccas. Often found near forested rivers and seasonal swamps at low elevations.
Song & Call Comparison
Black-necked Swan
A musical, whistling 'whoo' or soft 'whooh'. Less loud than Trumpeter or Whooper Swan. Gives hissing at close range. Considered relatively quiet for a large swan.
Spotted Whistling-duck
A musical, high whistle similar to other whistling-ducks. Call is softer and less far-carrying than White-faced or Black-bellied species. Given in flight and on water.
Geographic Range & Migration
Black-necked Swan
Breeds across the northern Great Plains and prairie provinces; winters along the Atlantic coast and Gulf of Mexico.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
보전 상태
Black-necked Swan
Spotted Whistling-duck
How to Tell Them Apart
Black-necked Swan
White body plumage with entirely black head, neck, and upper foreneck. Red double-lobed knob at bill base. Bill grayish-blue. White stripe behind eye. Pink-red legs. Sexes similar; striking contrast.
Spotted Whistling-duck
Dark brown above; head and neck dark brown. Underparts heavily spotted white on dark brown ground, giving spotted appearance. Flanks with bold white spots. Pink-red bill and legs. Sexes similar.
About These Birds
Black-necked Swan
순백의 몸 깃털과 대비되는 칠흑색 목과 머리, 선명한 붉은 혹이 있는 붉은 부리, 눈 뒤의 흰 줄을 가진 대형 우아한 고니. 남아메리카 남부 원산. 독특한 색채로 오인할 수 없다. 물에 상체를 담그며 수생식물을 먹는다.
Spotted Whistling-duck
옆구리에 굵은 흰 반점, 주황-붉은 부리와 다리, 엷은 얼굴을 가진 소형 어두운 갈색 홍따오기. 뉴기니·필리핀·인도네시아의 열대 습지에 서식. 종종 담수 개울과 침수 초원 근처에서 발견. 다른 홍따오기보다 덜 사회적.