Surf Scoter vs African Pygmy-goose
Melanitta perspicillata 比較対象 Nettapus auritus
Side-by-Side Comparison
| 属性 | Surf Scoter | African Pygmy-goose |
|---|---|---|
| 学名 | Melanitta perspicillata | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 45.3 cm (17.8 in) | 29.9 cm (11.8 in) |
| 体重 | 1019.75 g (35.97 oz) | 272.5 g (9.61 oz) |
| 食性 | Dives for molluscs, crustaceans, and herring spawn in coastal waters. Uses its distinctive swollen bill … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 一腹卵数 | 5-9 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
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
Surf Scoter
Male produces a low, gurgling burble; female gives a crow-like, guttural cawing. The female's rasping, crow-like call is startling; males make soft, liquid gurgling notes during courtship.
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
Surf Scoter
Breeds in boreal forests and tundra of northern North America. Winters along Pacific and Atlantic coasts south to Baja California and the Carolinas.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保全状況
Surf Scoter
African Pygmy-goose
How to Tell Them Apart
Surf Scoter
Male is entirely glossy black except for white patches on forehead and nape; bill tricolored orange, red, and white with black spot. Female sooty-brown with two white facial patches.
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
Surf Scoter
サーフスコーター。北米固有の海ガモ。雄は黒色の体に白い後頭部と前額の白斑が特徴的で、多彩な色の嘴も目立つ。北米のタイガ湖で繁殖し、冬は太平洋・大西洋沿岸に移動。貝類を主食とする。低危険種。
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。