American Black Duck vs Red-breasted Merganser
Anas rubripes comparado con Mergus serrator
Side-by-Side Comparison
| Atributo | American Black Duck | Red-breasted Merganser |
|---|---|---|
| Nombre científico | Anas rubripes | Mergus serrator |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 46,7 cm (18.4 in) |
| Peso | 1211,25 g (42.73 oz) | 1058,3333333333333 g (37.33 oz) |
| Dieta | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Dives for small fish, crustaceans, and aquatic invertebrates in coastal and freshwater habitats. Pursues fish … |
| Tamaño de la puesta | 1-17 | 6-14 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Red-breasted Merganser 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.
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.
Red-breasted Merganser
Male produces a harsh, rasping series of notes; female gives a rough, guttural grunting. The harsh, rattling call is louder than Goosander; pairs and flocks create a rasping coastal cacophony.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Red-breasted Merganser
Circumpolar breeder in boreal and Arctic zones. Winters on coasts and large water bodies south to the Mediterranean and southern Asia.
Estado de conservación
American Black Duck
Red-breasted Merganser
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 …
Red-breasted Merganser
Male has dark green shaggy double crest, speckled chestnut breast band, white collar, and grey flanks; red bill. Female has rufous-brown head with ragged crest blending gradually into grey neck …
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.
Red-breasted Merganser
El serrano o merganso mediano es un merganso de tamaño mediano con el macho de cabeza verde con un desordenado moño y el pecho manchado de castaño. Ampliamente distribuido en el hemisferio norte, cría principalmente en costas marinas y grandes lagos, siendo uno de los pocos mergansos que cría regularmente en ambientes costeros. Inverna en costas marinas de mares templados.