American Black Duck vs Snow Goose
Anas rubripes comparado con Anser caerulescens
Side-by-Side Comparison
| Atributo | American Black Duck | Snow Goose |
|---|---|---|
| Nombre científico | Anas rubripes | Anser caerulescens |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 82,4 cm (32.4 in) |
| Peso | 1211,25 g (42.73 oz) | 2561,0 g (90.34 oz) |
| Dieta | -- | Grazes submerged aquatic vegetation and eelgrass in estuaries; also takes grasses and sedges on coastal … |
| Tamaño de la puesta | 1-17 | 2-6 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Snow Goose only
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.
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.
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.
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.
Geographic Range & Migration
American Black Duck
Snow Goose
Breeds in eastern North America's boreal forest; winters on the Atlantic coast from New England to South Carolina.
Estado de conservación
American Black Duck
Snow 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 …
Snow Goose
About These Birds
American Black Duck
El pato negro americano es un gran pato de color marrón muy oscuro con una cabeza más clara y un llamativo espéculo alar púrpura. Habita en humedales del este de Norteamérica y se está hibridando cada vez más con el pato de collar introducido en su rango, lo que representa una amenaza para su pureza genética. Prefiere marismas costeras, pantanos boscosos y lagos tranquilos.
Snow Goose
El ganso de las nieves es un ganso ártico que se presenta en dos morfologías de color: una forma blanca con las puntas de las alas negras y una forma azul-grisácea. Cría en la tundra ártica y migra en enormes bandadas al sur de Estados Unidos y México para pasar el invierno. Sus poblaciones han aumentado explosivamente en las últimas décadas, causando problemas de sobrepastoreo en la tundra.