African Pygmy-goose vs Radjah Shelduck
Nettapus auritus 比較対象 Radjah radjah
Side-by-Side Comparison
| 属性 | African Pygmy-goose | Radjah Shelduck |
|---|---|---|
| 学名 | Nettapus auritus | Radjah radjah |
| 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) | 54.0 cm (21.3 in) |
| 体重 | 272.5 g (9.61 oz) | 883.5 g (31.16 oz) |
| 食性 | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … | Dabbles for seeds and aquatic invertebrates; also grazes on grasses; diet shifts between land and … |
| 一腹卵数 | 6-12 | 6-15 |
| 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.
Radjah Shelduck
Mangroves, tidal mudflats, tropical coastal wetlands, and freshwater lagoons in New Guinea and the tropical north of Australia (Queensland, Northern Territory, Western Australia). Nests in tree hollows near water.
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.
Radjah Shelduck
A loud, rattling 'radjah-radjah' or repeated cackling 'rak-rak-rak'. Calls from tropical Australian and New Guinea wetlands. Name is partly onomatopoeic.
Geographic Range & Migration
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
Radjah Shelduck
Breeds in the eastern Arctic of Russia; winters across southern Asia, from the Indian subcontinent to Southeast Asia.
保全状況
African Pygmy-goose
Radjah Shelduck
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.
Radjah Shelduck
White head and body with chestnut breastband and white-spotted chestnut scapulars. Pink bill and legs. Iridescent green speculum with white bar visible in flight. Sexes similar. Australasian mangrove specialist.
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。
Radjah Shelduck
A medium-sized elegant shelduck with white body plumage, chestnut breast band, dark green back, and pinkish-red bill and legs. Found in coastal mangroves, mudflats, and tropical wetlands of New Guinea and northern Australia. Calls with a loud raspy rattling sound.