American Black Duck vs Brazilian Merganser
Anas rubripes comparado con Mergus octosetaceus
Side-by-Side Comparison
| Atributo | American Black Duck | Brazilian Merganser |
|---|---|---|
| Nombre científico | Anas rubripes | Mergus octosetaceus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 39,2 cm (15.4 in) |
| Peso | 1211,25 g (42.73 oz) | 827,6666666666666 g (29.20 oz) |
| Dieta | -- | Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to … |
| Tamaño de la puesta | 1-17 | 5-8 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Brazilian Merganser only
Ninguno
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.
Brazilian Merganser
Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.
Geographic Range & Migration
American Black Duck
Brazilian Merganser
Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.
Estado de conservación
American Black Duck
Brazilian 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 …
Brazilian Merganser
Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.
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.
Brazilian Merganser
El merganso brasileño es uno de los patos más amenazados del mundo, con menos de 250 individuos maduros que subsisten en ríos rápidos y limpios del interior del Brasil, con pequeñas poblaciones en Argentina y Paraguay. Tiene plumaje negro con los flancos rojizos en el macho. La deforestación, la contaminación y los proyectos hidroeléctricos han destruido gran parte de su hábitat.