African Pygmy-goose vs Flying Steamerduck
Nettapus auritus 比較対象 Tachyeres patachonicus
Side-by-Side Comparison
| 属性 | African Pygmy-goose | Flying Steamerduck |
|---|---|---|
| 学名 | Nettapus auritus | Tachyeres patachonicus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 29.9 cm (11.8 in) | 57.4 cm (22.6 in) |
| 体重 | 272.5 g (9.61 oz) | 2620.75 g (92.44 oz) |
| 食性 | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … | Dabbles for seeds, invertebrates, and aquatic vegetation; widespread; diet varies from predominantly plant-based to invertebrate-rich. |
| 一腹卵数 | 6-12 | 5-9 |
| 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.
Flying Steamerduck
Freshwater lakes, rivers, coastal bays, and channels in Patagonian Chile and Argentina from the Lakes Region south to Tierra del Fuego. Partially migratory; some populations move to coasts in winter.
Song & Call Comparison
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.
Flying Steamerduck
A harsh, rattling 'rrrrr' and nasal calls. Flying Steamerduck can fly (unlike some relatives) and gives vocal calls in flight. Contact calls are clattering and guttural.
Geographic Range & Migration
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
Flying Steamerduck
Breeds across the boreal and subarctic zone of North America; winters broadly across the southern United States and Mexico.
保全状況
African Pygmy-goose
Flying Steamerduck
How to Tell Them Apart
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.
Flying Steamerduck
Males gray with chestnut-brown breast and white eye-stripe. Females brown-gray with white eye-ring and chestnut flanks. Orange-yellow bill. Only Tachyeres species capable of sustained flight. Wings larger.
About These Birds
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。
Flying Steamerduck
フライングスティーマーダックは南米南端のパタゴニアとフォークランド諸島に生息する飛べるスティーマーダックです。近縁の飛べない種と異なり、飛行能力を持ちます。沿岸の湿地、河川、湖に生息し、貝類、甲殻類を採食します。