American Black Duck vs Hawaiian Goose
Anas rubripes comparado con Branta sandvicensis
Side-by-Side Comparison
| Atributo | American Black Duck | Hawaiian Goose |
|---|---|---|
| Nombre científico | Anas rubripes | Branta sandvicensis |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Near Threatened |
| Longitud | — | — |
| Envergadura | 53,4 cm (21.0 in) | 72,8 cm (28.7 in) |
| Peso | 1211,25 g (42.73 oz) | 2150,0 g (75.84 oz) |
| Dieta | Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … | Eats aquatic plants, algae, and grasses; upends in shallow water to graze submerged vegetation; diet … |
| Tamaño de la puesta | 1-17 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Ninguno
American Black Duck only
Hawaiian 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.
Hawaiian Goose
Volcanic slopes, lava flows, coastal grasslands, and shrublands on Maui, Hawai'i, and Kauai. Adapted to rocky terrain with reduced toe webbing. Introduced to other Hawaiian islands. Avoids dense forest.
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.
Hawaiian Goose
A soft, low 'moo-moo' — the murmuring call gives the Nene its Hawaiian name. Also gives honking calls in flight. Less vocal than Canada Goose; distinctive murmuring quality.
Geographic Range & Migration
American Black Duck
Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.
Hawaiian Goose
Breeds in sub-Arctic Canada; winters on large lakes and rivers from the Gulf of Mexico north to where water remains open.
Estado de conservación
American Black Duck
Hawaiian 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 …
Hawaiian Goose
Buff-tan neck with black and white channeled furrows. Crown and face black; hindneck black. Body gray-brown above; underparts pale with buff breast. Reduced webbing on feet. Sexes similar. State bird …
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.
Hawaiian Goose
El ganso hawaiano o nene es el ganso endémico de las islas hawaianas y el ave oficial del estado de Hawaii. Tiene las patas con los dedos en parte sin membrana, lo que es una adaptación para caminar sobre las lavas volcánicas. Estuvo casi extinguido a mediados del siglo XX con sólo 30 individuos supervivientes, pero se ha recuperado gracias a la cría en cautiverio y la reintroducción.