Spotted Whistling-duck vs Velvet Scoter
Dendrocygna guttata 比較対象 Melanitta fusca
Side-by-Side Comparison
| 属性 | Spotted Whistling-duck | Velvet Scoter |
|---|---|---|
| 学名 | Dendrocygna guttata | Melanitta fusca |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 41.3 cm (16.3 in) | 51.8 cm (20.4 in) |
| 体重 | 677.5 g (23.90 oz) | 1635.1666666666667 g (57.68 oz) |
| 食性 | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for mussels, cockles, and crustaceans in coastal and brackish waters. Freshwater insects taken on … |
| 一腹卵数 | 10-11 | 7-9 |
| 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.
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
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
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
Spotted Whistling-duck
Velvet Scoter
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.
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
Spotted Whistling-duck
スポッテドウィスリングダックはインドネシア、フィリピン、パプアニューギニアに分布するツリーダックです。白い斑点のある褐色の羽毛が特徴で、夜間に特徴的な笛のような声でさえずります。熱帯の湿地、稲田、マングローブ林に生息し、草の種子や水草を採食します。
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。