Black Scoter vs African Pygmy-goose
Melanitta americana 비교 대상 Nettapus auritus
Side-by-Side Comparison
| 속성 | Black Scoter | African Pygmy-goose |
|---|---|---|
| 학명 | Melanitta americana | Nettapus auritus |
| 목 | Anseriformes | Anseriformes |
| 과 | Anatidae | Anatidae |
| 보전 상태 | Near Threatened | Least Concern |
| 체장 | — | — |
| 날개 폭 | 44.0 cm (17.3 in) | 29.9 cm (11.8 in) |
| 체중 | 1046.1 g (36.90 oz) | 272.5 g (9.61 oz) |
| 식성 | 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 … |
| 산란 수 | 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.
보전 상태
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
대형 해오리로 체장 48–55cm이며, 수컷은 전신이 검은색에 노란색 부리 혹을 갖는다. 북아메리카 북부 습지에서 번식하고 태평양과 대서양 해안에서 월동한다. 잠수하여 연체동물, 갑각류, 수생 곤충을 먹는다. 관심 필요 종이다.
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.