Whooper Swan vs Spotted Whistling-duck
Cygnus cygnus 比較対象 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | Whooper Swan | Spotted Whistling-duck |
|---|---|---|
| 学名 | Cygnus cygnus | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 116.4 cm (45.8 in) | 41.3 cm (16.3 in) |
| 体重 | 10350.0 g (365.09 oz) | 677.5 g (23.90 oz) |
| 食性 | Dabbling duck feeding on seeds, aquatic insects, and plant material; forages in shallow wetlands; diet … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 一腹卵数 | 2-12 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Whooper Swan
Breeds on boreal and subarctic lakes and boggy pools from Iceland and Scandinavia across northern Eurasia to Siberia. Winters on large lakes, estuaries, rivers, and agricultural fields in northwestern Europe and eastern Asia.
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
Whooper Swan
A loud, ringing 'wh-OOH-wh-OOH' bugle. Less high-pitched than Trumpeter; similar to Tundra Swan but deeper. Pairs call in musical antiphony. Carries very far over water.
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
Whooper Swan
Breeds in Arctic tundra from Siberia to western Canada; winters along the Pacific coast from British Columbia to Mexico.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
保全状況
Whooper Swan
Spotted Whistling-duck
How to Tell Them Apart
Whooper Swan
All-white plumage. Long yellow bill with large wedge-shaped yellow patch extending past nostrils, contrasting with black tip. Long flat head profile. Holds neck erect and straight. Juveniles pale gray-brown.
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
Whooper Swan
北ヨーロッパ・アジアで繁殖し、南方で越冬する大型のハクチョウ（体長140〜165cm）。純白の体と黄色が多い嘴が特徴。Cygnus cygnus（オオハクチョウ）は日本では北海道の阿寒湖、本州の猪苗代湖など各地の越冬地で見られ、ワシントン条約（CITES）とアフリカ・ユーラシア渡り性水鳥の保全に関する協定（AEWA）で保護されている。Anatidae科。
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。