African Black Duck vs Greylag Goose
Anas sparsa comparado con Anser anser
Side-by-Side Comparison
| Atributo | African Black Duck | Greylag Goose |
|---|---|---|
| Nombre científico | Anas sparsa | Anser anser |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 49,5 cm (19.5 in) | 87,1 cm (34.3 in) |
| Peso | 996,8333333333334 g (35.16 oz) | 3297,5 g (116.32 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Eats shoots, seeds, and aquatic plants; takes invertebrates in shallow water; diet varies between coastal … |
| Tamaño de la puesta | 4-9 | 3-12 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
African Black Duck only
Ninguno
Greylag Goose only
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.
Greylag Goose
Breeds on moorland, bogs, freshwater wetlands, and lake margins across Eurasia from Iceland to central Asia. Winters on estuaries, agricultural fields, and wetlands. Feral populations year-round in parks.
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.
Greylag Goose
A deep, loud 'aahng' honking. The ancestral goose of domesticated geese; its call is the template for the classic 'goose honk'. Flocks are highly vocal in flight.
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.
Greylag Goose
Breeds across central and northern North America; winters in the southern United States, Mexico, and Central America.
Estado de conservación
African Black Duck
Greylag 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 …
Greylag Goose
Large and heavy; uniformly gray-brown with pale feather fringes on back. Head and neck grayish-brown. Orange-pink bill; pink legs. Pale gray forewing conspicuous in flight. Ancestor of domestic geese.
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.
Greylag Goose
El ganso común es el antecesor del ganso doméstico más extendido en Europa. Tiene el cuerpo gris pardo, el pico naranja y las patas de color carne. Cría en humedales de Europa y Asia, y migra al sur en invierno. Es el ganso salvaje más grande de Europa y es la especie tipo del género Anser. Las parejas forman vínculos de larga duración y son conocidas por ser agresivas en la defensa del nido.