Black-bellied Whistling-duck vs African Pygmy-goose
Dendrocygna autumnalis 对比 Nettapus auritus
Side-by-Side Comparison
| 属性 | Black-bellied Whistling-duck | African Pygmy-goose |
|---|---|---|
| 学名 | Dendrocygna autumnalis | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 48.2 cm (19.0 in) | 29.9 cm (11.8 in) |
| 体重 | 757.9 g (26.73 oz) | 272.5 g (9.61 oz) |
| 食性 | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes and agricultural fields eating … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 产卵数 | 9-18 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
Black-bellied Whistling-duck
Freshwater wetlands, ponds, lake margins, flooded fields, and wooded swamps from the southern United States and Mexico through Central America to Ecuador, Bolivia, and Argentina. Uses nest boxes readily.
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-bellied Whistling-duck
A high, reedy whistle 'pe-che-che-ne' given in flight. Flocks produce a continuous whistling chorus. Also gives a squeaky 'whe-eee' contact call while swimming.
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-bellied Whistling-duck
Inhabits freshwater marshes and riverbanks from southeastern Brazil to northern Argentina and Bolivia. Sedentary; locally common.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保护状况
Black-bellied Whistling-duck
African Pygmy-goose
How to Tell Them Apart
Black-bellied Whistling-duck
Gray head with brown cap and chestnut breast; black belly is distinctive. Wings show broad white patch in flight. Coral-pink bill and long pink legs. Upright posture. Sexes similar.
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-bellied Whistling-duck
黑腹树鸭是美洲热带的常见树鸭，分布于美国得克萨斯至阿根廷的广大地区。以腹部黑色为特征，嘴和腿部红色，体羽棕褐色，翼具宽白斑。常在树洞中营巢，以水生植物、种子和谷物为食，有时成群觅食于稻田。具有长腿特征，可在陆地上奔走。
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.