American Black Duck vs Crested Shelduck
Anas rubripes comparado con Tadorna cristata
Side-by-Side Comparison
| Atributo | American Black Duck | Crested Shelduck |
|---|---|---|
| Nombre científico | Anas rubripes | Tadorna cristata |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 59,8 cm (23.5 in) |
| Peso | 1211,25 g (42.73 oz) | 1235,0 g (43.56 oz) |
| Dieta | -- | -- |
| Tamaño de la puesta | 1-17 | 10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
American Black Duck only
Crested 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.
Crested Shelduck
Historically known from coastal Korea, Siberia, and possibly Japan. Habitat preferences poorly known; specimens were collected near coasts and rivers. Possibly extinct.
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.
Crested Shelduck
Critically endangered; last confirmed sightings in 1971. No vocalizations reliably recorded. Presumed similar to related shelducks based on phylogeny but effectively unknown.
Estado de conservación
American Black Duck
Crested 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 …
Crested Shelduck
Critically rare; known from few specimens. Males dark green head with bushy crest; black and white body with chestnut flanks. Females have white facial markings and brown-barred body. Possibly extinct; …
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.
Crested Shelduck
El tarro crestudo es una especie casi extinguida y extremadamente rara originaria de Corea, China y posiblemente Japón. Solo se conocen tres pieles de museo y avistamientos muy ocasionales en estado salvaje; no ha sido confirmada desde los años 1970. Tenía plumaje negro, blanco y verde con una cresta verde en la cabeza. Las causas de su probable extinción incluyen la caza y la pérdida de hábitat.