Red-crested Pochard vs African Pygmy-goose
Netta rufina 比較対象 Nettapus auritus
Side-by-Side Comparison
| 属性 | Red-crested Pochard | African Pygmy-goose |
|---|---|---|
| 学名 | Netta rufina | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 51.7 cm (20.4 in) | 29.9 cm (11.8 in) |
| 体重 | 1087.5 g (38.36 oz) | 272.5 g (9.61 oz) |
| 食性 | Dives for molluscs and aquatic invertebrates in coastal habitats; diet dominated by hard-shelled benthic invertebrates. | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 一腹卵数 | 6-14 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
Red-crested Pochard
Large freshwater and brackish lakes, reservoirs, river deltas, and coastal lagoons across southern Europe and Central Asia. Winters on large open water bodies in southern Europe, the Middle East, and South Asia.
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
Red-crested Pochard
Male emits a harsh, rasping errr note; female gives a loud, quacking series. The raspy male call is distinctive among pochards; alarm is an emphatic, repeated series on Eurasian lakes.
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
Red-crested Pochard
Breeds across Arctic and subarctic North America; winters broadly across the interior and coastal United States.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保全状況
Red-crested Pochard
African Pygmy-goose
How to Tell Them Apart
Red-crested Pochard
Males have rounded orange-rufous head with bright red bill; black breast, neck and undertail; white flanks; brown back. Females dark brown with pale cheeks. Bold white wing stripe in flight. …
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
Red-crested Pochard
南ヨーロッパ・中央アジアの湖沼で繁殖する大型の潜水ガモ（体長53〜57cm）。雄の赤みがかった褐色の頭とオレンジの嘴が特徴的。Netta rufina（アカハジロ）は水深の浅い湖で水草の根や茎を食べ、カモメが多い環境でも見られる。ヨーロッパでは越冬数が増加傾向にある。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。