Whooper Swan vs African Pygmy-goose
Cygnus cygnus 比較対象 Nettapus auritus
Side-by-Side Comparison
| 属性 | Whooper Swan | African Pygmy-goose |
|---|---|---|
| 学名 | Cygnus cygnus | Nettapus auritus |
| 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) | 29.9 cm (11.8 in) |
| 体重 | 10350.0 g (365.09 oz) | 272.5 g (9.61 oz) |
| 食性 | Dabbling duck feeding on seeds, aquatic insects, and plant material; forages in shallow wetlands; diet … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 一腹卵数 | 2-12 | 6-12 |
| 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.
African Pygmy-goose
Freshwater lakes, ponds, and rivers with floating water lilies and other aquatic vegetation across sub-Saharan Africa from Senegal to Tanzania. Nests in tree cavities near water. Highly dependent on water lily vegetation.
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.
African Pygmy-goose
Male produces a soft, wheezy whistle; female gives a quiet, duck-like quack. Pairs exchange rapid twittering notes during courtship on lily-covered African pools.
Geographic Range & Migration
Whooper Swan
Breeds in Arctic tundra from Siberia to western Canada; winters along the Pacific coast from British Columbia to Mexico.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保全状況
Whooper Swan
African Pygmy-goose
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.
African Pygmy-goose
Tiny. Males have glossy dark green head with orange facial patch and ear spot; chestnut-orange flanks; white underparts; black and green back. Females duller with dark eye-stripe. Small yellow-green bill.
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。
African Pygmy-goose
アフリカンピグミーグースはアフリカ南部と東部に分布する小型の木巣性カモです。雄の緑と栗色の美しい羽毛と小さなサイズが特徴的です。水草が豊富な湖や沼地に生息し、蓮や水草の種子を主食とします。木の洞に営巣します。