American Black Duck vs Common Shelduck
Anas rubripes comparado con Tadorna tadorna
Side-by-Side Comparison
| Atributo | American Black Duck | Common Shelduck |
|---|---|---|
| Nombre científico | Anas rubripes | Tadorna tadorna |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 62,8 cm (24.7 in) |
| Peso | 1211,25 g (42.73 oz) | 1035,5 g (36.53 oz) |
| Dieta | -- | -- |
| Tamaño de la puesta | 1-17 | 3-18 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Common Shelduck 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.
Common Shelduck
Coastal estuaries, mudflats, saltmarshes, sand dunes, and inland saline lakes from northwest Europe east across Eurasia to China. Winters mainly on tidal estuaries and coastal wetlands. Nests in burrows.
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.
Common Shelduck
Male gives a whistled 'wheee'; female gives a cackling series of rapid nasal 'ak-ak-ak' notes. One of the most sexually dimorphic calls of any shelduck species.
Geographic Range & Migration
American Black Duck
Common Shelduck
Breeds in Siberian tundra; winters in eastern and southern Africa, and in South and Southeast Asia. Trans-hemispheric migrant.
Estado de conservación
American Black Duck
Common Shelduck
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 …
Common Shelduck
White body with dark green head, broad chestnut breastband, and black scapular stripes. Red bill with basal knob in males. Green speculum and black wingtips. Underparts white with black belly …
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.
Common Shelduck
El tarro común es un grande y llamativo pato con el inconfundible plumaje blanco con la cabeza verde-negro brillante, una ancha banda pectoral castaña y el pico rojo. Es frecuente en estuarios, costas arenosas, marismas y lagunas salinas desde Europa occidental hasta Asia central. Los pollos de varias familias se agrupan frecuentemente en guarderías bajo el cuidado de unos pocos adultos.