African Black Duck vs Ashy-headed Goose
Anas sparsa comparado com Chloephaga poliocephala
Side-by-Side Comparison
| Atributo | African Black Duck | Ashy-headed Goose |
|---|---|---|
| Nome científico | Anas sparsa | Chloephaga poliocephala |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 49,5 cm (19.5 in) | 69,1 cm (27.2 in) |
| Peso | 996,8333333333334 g (35.16 oz) | 1779,25 g (62.76 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … | Eats grasses, seeds, and aquatic invertebrates; grazes upland pastures and dabbles in wetlands; diet varies … |
| Tamanho da postura | 4-9 | 4-6 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
African Black Duck only
Nenhum
Ashy-headed 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.
Ashy-headed Goose
Temperate forests, forest clearings, and lake margins in southern Chile and Patagonian Argentina. Partially migratory; breeds in beech forest zones and winters on open grasslands farther north.
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.
Ashy-headed Goose
A whistled 'seeeeu' from males and a lower cackling from females. Ashy-headed Goose calls carry across Andean foothills and Patagonian grassland habitats.
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.
Ashy-headed Goose
Inhabits wetlands and flooded grasslands across South and Southeast Asia, from India to Indonesia. Largely resident year-round.
Estado de conservação
African Black Duck
Ashy-headed 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 …
Ashy-headed Goose
Gray head and neck contrast with chestnut breast and rufous-barred flanks. Back brown; belly white. White wing patch in flight with iridescent green speculum. Yellow-orange legs. Sexes similar but females …
About These Birds
African Black Duck
O pato-negro-africano é um pato dabbling de tamanho médio das correntes de montanha e rios do leste e sul da África. Tem plumagem preta com barras brancas visíveis no peito e flancos. Habita rios de correnteza rápida com margens rochosas, geralmente em altitudes mais elevadas. É menos dependente de zonas húmidas abertas do que a maioria dos patos dabbling. É encontrado em florestas ribeirínhas e paisagens de savana com rios adequados. É uma espécie residente e não migratória.
Ashy-headed Goose
O ganso-de-cabeça-cinza é um ganso médio andino e patagónico do sul da América do Sul. Tem uma cabeça cinzento-pálida característica que contrasta com o corpo castanho-ruivo e as barras pretas e brancas nos flancos. Habita prados e zonas húmidas andinas e patagónicas, migrando para elevações inferiores no inverno. É frequentemente visto em pares ou pequenos grupos. Como outros gansos-da-patagónia, os pares mantêm ligações de longa duração.