Ashy-headed Goose vs Mallard
Chloephaga poliocephala 对比 Anas platyrhynchos
Side-by-Side Comparison
| 属性 | Ashy-headed Goose | Mallard |
|---|---|---|
| 学名 | Chloephaga poliocephala | Anas platyrhynchos |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | 58.0 cm (22.8 in) |
| 翼展 | 69.1 cm (27.2 in) | 90.0 cm (35.4 in) |
| 体重 | 1779.25 g (62.76 oz) | 1100.0 g (38.80 oz) |
| 食性 | Eats grasses, seeds, and aquatic invertebrates; grazes upland pastures and dabbles in wetlands; diet varies … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 产卵数 | 4-6 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Ashy-headed Goose
Temperate forests, forest clearings, and lake margins in southern Chile and Patagonian Argentina. Partially migratory; breeds in beech forest zones and winters on open grasslands farther north.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Ashy-headed Goose
A whistled 'seeeeu' from males and a lower cackling from females. Ashy-headed Goose calls carry across Andean foothills and Patagonian grassland habitats.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Ashy-headed Goose
Inhabits wetlands and flooded grasslands across South and Southeast Asia, from India to Indonesia. Largely resident year-round.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
保护状况
Ashy-headed Goose
Mallard
How to Tell Them Apart
Ashy-headed Goose
Gray head and neck contrast with chestnut breast and rufous-barred flanks. Back brown; belly white. White wing patch in flight with iridescent green speculum. Yellow-orange legs. Sexes similar but females …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
About These Birds
Ashy-headed Goose
灰头雁是南美洲南部特有的中型雁类，分布于智利南部、阿根廷西南部和福克兰群岛。雌雄羽色相近，头颈灰色，体羽栗褐色带黑色横纹，翼具白色镜斑。栖息于开阔的草原、湿地和森林边缘，以草地植物为食，常沿安第斯山脉河谷迁徙。
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.