Ferruginous Duck vs Spotted Whistling-duck
Aythya nyroca 비교 대상 Dendrocygna guttata
Side-by-Side Comparison
| 속성 | Ferruginous Duck | Spotted Whistling-duck |
|---|---|---|
| 학명 | Aythya nyroca | Dendrocygna guttata |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Near Threatened | Least Concern |
| 체장 | — | — |
| 날개 폭 | 36.5 cm (14.4 in) | 41.3 cm (16.3 in) |
| 체중 | 594.1666666666666 g (20.96 oz) | 677.5 g (23.90 oz) |
| 식성 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal habitats; diet dominated by hard-shelled invertebrates. | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 산란 수 | 4-17 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Ferruginous Duck
Freshwater lakes, marshes, and river deltas with dense emergent vegetation in southern Eurasia from central Europe east to Central Asia and China. Winters in the Mediterranean, South Asia, and sub-Saharan Africa.
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
Ferruginous Duck
Male emits a soft, wheeling purr; female gives a harsh, rapid quacking series. The male's quiet purring display call contrasts with the female's repeated, grating notes on Mediterranean marshes.
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
Ferruginous Duck
Breeds in boreal and sub-Arctic Canada; winters on the Atlantic coast from New England to the Gulf States.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
보전 상태
Ferruginous Duck
Spotted Whistling-duck
How to Tell Them Apart
Ferruginous Duck
Rich chestnut-brown head, neck and breast; white undertail conspicuous. White eye in males (brown in females). Dark back. Bold white wing stripe in flight. Compact and rounded. Males brighter chestnut; …
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
Ferruginous Duck
소형 날씬한 잠수오리입니다. 수컷은 풍부한 밤색 머리와 몸통, 흰 눈, 흰 아래꼬리를 가지며 암컷은 더 둔합니다. 유라시아와 아프리카 전역에 분포합니다. 지중해와 중앙아시아 호수에서 국지적으로 흔하며 개체수 감소 중. 전 세계적으로 준위협(NT) 종입니다.
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.