Greater White-fronted Goose vs Ruddy-headed Goose
Anser albifrons 对比 Chloephaga rubidiceps
Side-by-Side Comparison
| 属性 | Greater White-fronted Goose | Ruddy-headed Goose |
|---|---|---|
| 学名 | Anser albifrons | Chloephaga rubidiceps |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 81.6 cm (32.1 in) | 65.1 cm (25.6 in) |
| 体重 | 2471.0 g (87.16 oz) | 1756.8333333333333 g (61.97 oz) |
| 食性 | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | -- |
| 产卵数 | 3-9 | 3-8 |
| Population Trend | — | — |
Habitat Comparison
Greater White-fronted Goose
Breeds on Arctic and subarctic tundra and peatlands. Winters on estuaries, agricultural fields, freshwater marshes, and flooded meadows across Europe, Asia, and North America. One of the most widespread geese.
Ruddy-headed Goose
Breeds on open tussock grasslands and moorland in Tierra del Fuego and the Falkland Islands. Mainland wintering population on Patagonian grasslands now critically small. Falkland Islands population relatively stable.
Song & Call Comparison
Greater White-fronted Goose
A loud, laughing 'kow-lyuk' or musical 'wah-wah'. Gives a distinctive high-pitched yodeling quality lacking in Greylag. Highly vocal in large winter flocks.
Ruddy-headed Goose
A high, whistled 'whee' from males and a cackling rattle from females. Calls similar to Ashy-headed Goose. Falkland Islands population; calls in open coastal grassland.
Geographic Range & Migration
Greater White-fronted Goose
Breeds in the potholes region of the northern Great Plains; winters in the southern United States and along the Gulf Coast.
Ruddy-headed Goose
保护状况
Greater White-fronted Goose
Ruddy-headed Goose
How to Tell Them Apart
Greater White-fronted Goose
Brown-gray body with white forehead patch bordered by white band at bill base. Underparts with bold irregular black bars on belly. Orange bill; orange-yellow legs. Juveniles lack white front and …
Ruddy-headed Goose
Distinctive rufous-brown head and neck; body barred rufous and black above; underparts buff-white finely barred. Orange-yellow legs. White wing patches in flight. Compact; sexes similar. Falklands and Patagonia.
About These Birds
Greater White-fronted Goose
A medium-large goose with a white forehead patch, orange bill, grey-brown plumage, and variable black barring on the belly. Widespread and numerous; one of the most abundant geese in the world. Breeds across the high Arctic; winters in a wide range of temperate wetland and agricultural habitats.
Ruddy-headed Goose
棕头雁是南美洲南端的小型雁类，繁殖于阿根廷和智利的巴塔哥尼亚，越冬于布宜诺斯艾利斯省。雄鸟头部棕红色，体羽白色带黑色横纹；雌鸟相似。由于猎捕和栖息地改变，被列为易危物种，在部分越冬地数量大幅下降。