Gadwall vs African Pygmy-goose
Mareca strepera เปรียบเทียบกับ Nettapus auritus
Side-by-Side Comparison
| คุณสมบัติ | Gadwall | African Pygmy-goose |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Mareca strepera | Nettapus auritus |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 50.3 cm (19.8 in) | 29.9 cm (11.8 in) |
| น้ำหนัก | 857.5 g (30.25 oz) | 272.5 g (9.61 oz) |
| อาหาร | Dabbles for seeds and aquatic invertebrates; diet shifts toward invertebrates in spring; forages in shallow … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| จำนวนไข่ | 5-15 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
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Gadwall only
African Pygmy-goose only
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Gadwall
Freshwater lakes, reservoirs, marshes, and rivers with emergent vegetation across Eurasia and North America. Winters on large open wetlands and coastal estuaries. Range and population increasing in Europe.
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
Gadwall
Male utters a soft, nasal nheck note; female produces a series of descending, quacking notes. Both sexes are relatively quiet; female's quacking is softer and less strident than a Mallard.
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
Gadwall
Found year-round in Australia and New Zealand; nomadic in arid Australia, following temporary rainfall-fed wetlands.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
สถานะการอนุรักษ์
Gadwall
African Pygmy-goose
How to Tell Them Apart
Gadwall
Males have finely vermiculated gray-brown plumage with black rump and undertail. White speculum patch diagnostic in flight. Females mottled brown like Mallard but smaller and with orange-sided bill. Subtle but …
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
Gadwall
A medium-sized dabbling duck. Males appear grey-brown but are intricately patterned with fine grey vermiculations, black rump, and white speculum. Females resemble Mallard but with orange-sided bill. Widespread across Eurasia and North America. Feeds by dabbling and grazing.
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.