Common Goldeneye vs African Pygmy-goose
Bucephala clangula 比較対象 Nettapus auritus
Side-by-Side Comparison
| 属性 | Common Goldeneye | African Pygmy-goose |
|---|---|---|
| 学名 | Bucephala clangula | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 41.7 cm (16.4 in) | 29.9 cm (11.8 in) |
| 体重 | 921.0 g (32.49 oz) | 272.5 g (9.61 oz) |
| 食性 | Dives for aquatic invertebrates, crustaceans, molluscs, and small fish. Forages in lakes, rivers, and coastal … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 一腹卵数 | 1-28 | 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
Common Goldeneye
Male emits a buzzy, insect-like zeee-zeee-zeee wing whistle; female gives a grating quack. The mechanical wing-whistle produced by the male in display flight is the species' most distinctive sound.
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
Common Goldeneye
Breeds across boreal forests of North America, Europe, and Asia. Winters on coasts and large lakes south to the Mediterranean and the Gulf states.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保全状況
Common Goldeneye
African Pygmy-goose
How to Tell Them Apart
Common Goldeneye
Male has glossy green-black head with round white spot at bill base; body white with black back and scapulars; yellow eye. Female has chocolate-brown head, white collar, and grey body.
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
Common Goldeneye
ユーラシア大陸と北米の北方林で繁殖する潜水ガモ（体長40〜51cm）。雄は緑色光沢の頭部と白い眼下斑が特徴的。Bucephala clangula（ホオジロガモ）は木の洞に営巣し、飛翔時に翼から「スズ」のような音を出すことで知られる。日本の冬の海岸・湖沼でも観察できる。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。