Wandering Whistling-duck vs Velvet Scoter
Dendrocygna arcuata 비교 대상 Melanitta fusca
Side-by-Side Comparison
| 속성 | Wandering Whistling-duck | Velvet Scoter |
|---|---|---|
| 학명 | Dendrocygna arcuata | Melanitta fusca |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Least Concern | Vulnerable |
| 체장 | — | — |
| 날개 폭 | 37.2 cm (14.6 in) | 51.8 cm (20.4 in) |
| 체중 | 779.5 g (27.50 oz) | 1635.1666666666667 g (57.68 oz) |
| 식성 | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dives for mussels, cockles, and crustaceans in coastal and brackish waters. Freshwater insects taken on … |
| 산란 수 | 6-15 | 7-9 |
| Population Trend | — | — |
Habitat Comparison
공유 서식지
Wandering Whistling-duck only
없음
Velvet Scoter only
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
Song & Call Comparison
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
Velvet Scoter
Male emits a low, melodious whistled note; female produces a guttural, rasping call. The male's soft whistle contrasts with the female's harsh, buzzy alarm call on European coasts.
Geographic Range & Migration
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
Velvet Scoter
Breeds in boreal forests of northern Europe and western Siberia. Winters on coasts of northwestern Europe, the Black Sea, and Caspian Sea.
보전 상태
Wandering Whistling-duck
Velvet Scoter
How to Tell Them Apart
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. Sexes similar.
Velvet Scoter
Male is jet black overall with a small white teardrop below eye and white speculum visible in flight; yellow-sided bill with black knob at base. Female is dark brown with …
About These Birds
Wandering Whistling-duck
황갈색-갈색 몸통, 어두운 갈색 등, 엷은 황갈색 아랫면, 밤색 목깃을 가진 중형 홍따오기. 인도네시아에서 호주·태평양 섬까지 열대 습지에 서식. 매우 사회적이고 유목성. 얕은 담수에서 수면 채이기와 잠수로 채이며 먹이를 구한다.
Velvet Scoter
대형 해오리로 체장 51–58cm이며, 수컷은 전신이 검은색에 흰 눈 반점, 흰 날개 반점, 오렌지색 부리를 갖는다. 유라시아 북부의 호수와 습지에서 번식하고 유럽과 아시아 해안에서 월동한다. 잠수하여 연체동물과 갑각류를 먹는다. 취약한 상태이다.