Wandering Whistling-duck vs Velvet Scoter
Dendrocygna arcuata 比較対象 Melanitta fusca
Side-by-Side Comparison
| 属性 | Wandering Whistling-duck | Velvet Scoter |
|---|---|---|
| 学名 | Dendrocygna arcuata | Melanitta fusca |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 37.2 cm (14.6 in) | 51.8 cm (20.4 in) |
| 体重 | 779.5 g (27.50 oz) | 1635.1666666666667 g (57.68 oz) |
| 食性 | 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 … |
| 一腹卵数 | 6-15 | 7-9 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Wandering Whistling-duck only
None
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.
保全状況
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
ワンデリングウィスリングダックは東南アジアからオーストラリアにかけて分布するツリーダックです。栗色の羽毛と長い首が特徴で、群れで移動します。湿地、稲田、水草に覆われた湖に生息し、水草、種子、藻類を採食します。
Velvet Scoter
北ヨーロッパ・アジアの森林湖で繁殖し、沿岸で越冬する大型の潜水ガモ（体長51〜58cm）。雄は光沢のある黒い体に白い翼斑と眼下の白点が特徴。Melanitta fusca（ビロードスズガモ）は主に二枚貝を食べ、荒波の沿岸でも潜水採食できる。日本の日本海側沿岸でも越冬が観察される。Anatidae科。