Snow Goose vs Wandering Whistling-duck
Anser caerulescens 比較対象 Dendrocygna arcuata
Side-by-Side Comparison
| 属性 | Snow Goose | Wandering Whistling-duck |
|---|---|---|
| 学名 | Anser caerulescens | Dendrocygna arcuata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 82.4 cm (32.4 in) | 37.2 cm (14.6 in) |
| 体重 | 2561.0 g (90.34 oz) | 779.5 g (27.50 oz) |
| 食性 | Grazes submerged aquatic vegetation and eelgrass in estuaries; also takes grasses and sedges on coastal … | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … |
| 一腹卵数 | 2-6 | 6-15 |
| Population Trend | — | — |
Habitat Comparison
Snow Goose
Breeds on coastal and inland Arctic tundra in Canada, Alaska, and Greenland. Winters on agricultural fields, marshes, and coastal wetlands across the United States and northern Mexico. Forms enormous flocks.
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
Song & Call Comparison
Snow Goose
A loud, nasal barking 'luk-luk' or 'kow-kow'. Large flocks create enormous noise during Arctic nesting and winter staging. Considered a noisy, conspicuous goose.
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
Geographic Range & Migration
Snow Goose
Breeds in eastern North America's boreal forest; winters on the Atlantic coast from New England to South Carolina.
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
保全状況
Snow Goose
Wandering Whistling-duck
How to Tell Them Apart
Snow Goose
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. Sexes similar.
About These Birds
Snow Goose
北極圏（カナダ、シベリア）で繁殖し、北米南部や東アジアで越冬するガン（体長64〜79cm）。白色型と青灰色型（ブルーグース）の2つの色彩型がある。Anser caerulescens（ハクガン）は渡りの際に何百万羽もの大群を形成することで知られ、農業地帯での農作物被害が問題になることもある。Anatidae科。
Wandering Whistling-duck
ワンデリングウィスリングダックは東南アジアからオーストラリアにかけて分布するツリーダックです。栗色の羽毛と長い首が特徴で、群れで移動します。湿地、稲田、水草に覆われた湖に生息し、水草、種子、藻類を採食します。