African Pygmy-goose vs Spectacled Duck
Nettapus auritus 比較対象 Speculanas specularis
Side-by-Side Comparison
| 属性 | African Pygmy-goose | Spectacled Duck |
|---|---|---|
| 学名 | Nettapus auritus | Speculanas specularis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Near Threatened |
| 体長 | — | — |
| 翼開長 | 29.9 cm (11.8 in) | 52.4 cm (20.6 in) |
| 体重 | 272.5 g (9.61 oz) | 1248.25 g (44.03 oz) |
| 食性 | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … | Eats aquatic plants, seeds, and invertebrates; dabbles in shallow water; diet varies widely between seasons … |
| 一腹卵数 | 6-12 | 4-9 |
| 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.
Spectacled Duck
Clear fast-flowing rivers and streams in temperate forest from central Chile and adjacent Argentina south to Tierra del Fuego. Requires cold turbulent mountain rivers with riparian forest. Avoids slow or muddy 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.
Spectacled Duck
Emits deep, guttural quacking notes; alarm is a loud, repeated honking bark. Calls are resonant and powerful, carrying far along fast-flowing Patagonian rivers.
Geographic Range & Migration
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
Spectacled Duck
Breeds in wetlands from Iceland to Siberia; winters in temperate and subtropical Asia, Europe, and North Africa.
保全状況
African Pygmy-goose
Spectacled Duck
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.
Spectacled Duck
Dark brown body with fine pale speckling. Distinctive white 'spectacle' rings around eyes. Iridescent greenish-bronze speculum. Underparts pale buff-brown. Bill grayish; legs orange. Andean and Patagonian streams.
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。
Spectacled Duck
A large dark brown duck with distinctive white spectacle-like eye-rings, a pale buff face, and a prominent white speculum. Found in fast-flowing forest rivers of southern South America. Shy and elusive; inhabits clear rushing rivers through temperate forest. Also known as the Bronze-winged Duck.