African Black Duck vs Emperor Goose
Anas sparsa comparado con Anser canagicus
Side-by-Side Comparison
| Atributo | African Black Duck | Emperor Goose |
|---|---|---|
| Nombre científico | Anas sparsa | Anser canagicus |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 49,5 cm (19.5 in) | 74,8 cm (29.4 in) |
| Peso | 996,8333333333334 g (35.16 oz) | 2300,45 g (81.15 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Grazes aquatic plants and terrestrial grasses; upends in shallow water; winter diet shifts toward grain … |
| Tamaño de la puesta | 4-9 | 1-8 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
African Black Duck only
Ninguno
Emperor Goose only
Ninguno
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Emperor Goose
Breeds on coastal tundra near the Bering Sea in Alaska and Chukotka. Winters on rocky coastal shorelines, kelp beds, and intertidal flats along the Aleutian Islands and Alaska Peninsula.
Song & Call Comparison
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
Emperor Goose
A low, nasal 'clag-clag' call. Less vocal than other Anser geese. Gives contact calls in flocks during Arctic breeding and Pacific coast wintering. Somewhat quiet.
Geographic Range & Migration
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
Emperor Goose
Breeds in the eastern Arctic of Canada; winters along the Atlantic coast from Newfoundland to Florida and occasionally to Texas.
Estado de conservación
African Black Duck
Emperor Goose
How to Tell Them Apart
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
Emperor Goose
Body plumage blue-gray with black and white feather scalloping. White head and hindneck contrasting with dark throat. Orange-yellow legs. Bill pink-orange. Tail white. Adults striking; sexes similar.
About These Birds
African Black Duck
El pato africano moteado es un pato de tamaño mediano de color marrón oscuro con motas blancas en el pecho y los flancos. Habita en ríos de rápido caudal, cascadas y arroyos de montaña en África central y meridional, siendo inusual entre los patos por su preferencia por aguas corrientes y turbulentas. También se encuentra en altitudes elevadas en las zonas montañosas de África oriental.
Emperor Goose
El ganso emperador es un ganso ártico que cría exclusivamente en las costas de Alaska y el extremo noreste de Siberia, pasando el invierno principalmente en las costas de las islas Aleutianas y el suroeste de Alaska. Tiene el plumaje gris barrado con la cabeza y la parte superior del cuello blancos. Se alimenta principalmente de plantas costeras, algas marinas e invertebrados intertidales.