American Black Duck vs Kelp Goose
Anas rubripes 比較対象 Chloephaga hybrida
Side-by-Side Comparison
| 属性 | American Black Duck | Kelp Goose |
|---|---|---|
| 学名 | Anas rubripes | Chloephaga hybrida |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 53.4 cm (21.0 in) | 71.6 cm (28.2 in) |
| 体重 | 1211.25 g (42.73 oz) | 2735.0 g (96.47 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-17 | 3-7 |
| Population Trend | — | — |
Habitat Comparison
American Black Duck
Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.
Kelp Goose
Rocky wave-washed shores, sea channels, and kelp-fringed coasts of Patagonian Chile and Argentina south to Tierra del Fuego, and the Falkland Islands. Strictly coastal; almost never moves inland.
Song & Call Comparison
American Black Duck
Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.
Kelp Goose
A loud, nasal 'honk'. Male is mostly white and gives sharper calls; female is dark and gives softer, lower honks. Coastal Patagonian and Falklands habitat; highly vocal.
保全状況
American Black Duck
Kelp Goose
How to Tell Them Apart
American Black Duck
Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …
Kelp Goose
Extreme dimorphism. Males entirely white with yellow bill and legs. Females dark brown barred white overall; yellow legs. Coastal species of rocky shores. Sexes so different they were once considered …
About These Birds
American Black Duck
北米東部の湿地、沼、河川に生息するカモ（体長53〜61cm）。全体的に暗褐色でマガモの雌に似るが、嘴の色や翼鏡の色が異なる。Anas rubripes（アメリカクロガモ）は海岸の塩性湿地から内陸の淡水域まで幅広く利用し、マガモとの雑種が多く観察される。Anatidae科。
Kelp Goose
ケルプグースは南米南端のパタゴニアとフォークランド諸島の海岸に生息するガン科鳥類です。雄は白い羽毛、雌は黒白の羽毛が特徴的です。海岸の岩礁に生息し、ケルプなどの海藻を主食とします。海岸に生息する珍しいガン科鳥類です。