Spotted Whistling-duck vs Brazilian Merganser
Dendrocygna guttata 비교 대상 Mergus octosetaceus
Side-by-Side Comparison
| 속성 | Spotted Whistling-duck | Brazilian Merganser |
|---|---|---|
| 학명 | Dendrocygna guttata | Mergus octosetaceus |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Critically Endangered |
| 체장 | — | — |
| 날개 폭 | 41.3 cm (16.3 in) | 39.2 cm (15.4 in) |
| 체중 | 677.5 g (23.90 oz) | 827.6666666666666 g (29.20 oz) |
| 식성 | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| 산란 수 | 10-11 | 5-8 |
| Population Trend | — | — |
Habitat Comparison
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
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.
Brazilian Merganser
Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.
Geographic Range & Migration
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
보전 상태
Spotted Whistling-duck
Brazilian Merganser
How to Tell Them Apart
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.
Brazilian Merganser
Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.
About These Birds
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.
Brazilian Merganser
중형 물오리로 체장 약 55cm이며, 수컷은 광택 있는 녹색 머리, 흰 몸통, 빨간 부리를 갖는다. 남아메리카 내륙 강과 청정 하천에 서식한다. 잠수하여 어류를 먹는다. 위기 상태이다.