Black Scoter vs African Pygmy-goose
Melanitta americana 对比 Nettapus auritus
Side-by-Side Comparison
| 属性 | Black Scoter | African Pygmy-goose |
|---|---|---|
| 学名 | Melanitta americana | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Near Threatened | Least Concern |
| 体长 | — | — |
| 翼展 | 44.0 cm (17.3 in) | 29.9 cm (11.8 in) |
| 体重 | 1046.1 g (36.90 oz) | 272.5 g (9.61 oz) |
| 食性 | Dives for molluscs, particularly mussels and clams, in coastal waters. Takes aquatic insects and plant … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 产卵数 | 5-11 | 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
Black Scoter
Male produces a low, melodious whistle; female gives a harsh, grating call. Closely related to Common Scoter; voice very similar; heard on North American Pacific and Atlantic coasts in winter.
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
Black Scoter
Breeds in boreal forests and tundra of Alaska and northern Canada. Winters along Pacific and Atlantic coasts south to Baja California and Florida.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保护状况
Black Scoter
African Pygmy-goose
How to Tell Them Apart
Black Scoter
Male is pure glossy black throughout with a prominent bright orange-yellow knob at bill base. Female is dark sooty-brown with pale buff cheeks and foreneck contrasting with darker cap and …
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
Black Scoter
美洲黑海番鸭是北美的黑色海鸭，雄鸟全身黑色，嘴部具橙黄色斑块；雌鸟褐色，脸颊浅色。繁殖于阿拉斯加和加拿大北部湖泊，越冬于北太平洋和北大西洋沿岸。善深潜，主要以贻贝等软体动物为食。近年来北太平洋种群数量有所下降。
African Pygmy-goose
A tiny jewel-like duck—one of Africa's smallest waterfowl. Males have iridescent green-and-white plumage, an orange bill, and a dark green cap; females are mottled brown. Found on lily-covered lakes in sub-Saharan Africa. Perches on water lily pads and feeds on their seeds and flowers.