Yellow-billed Duck vs Greater White-fronted Goose
Anas undulata comparado com Anser albifrons
Side-by-Side Comparison
| Atributo | Yellow-billed Duck | Greater White-fronted Goose |
|---|---|---|
| Nome científico | Anas undulata | Anser albifrons |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 48,1 cm (18.9 in) | 81,6 cm (32.1 in) |
| Peso | 907,6666666666666 g (32.02 oz) | 2471,0 g (87.16 oz) |
| Dieta | Dives for fish, frogs, and aquatic invertebrates; uses serrated bill to grip prey; diet shifts … | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … |
| Tamanho da postura | 4-12 | 3-9 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Yellow-billed Duck only
Nenhum
Greater White-fronted Goose only
Yellow-billed Duck
Freshwater lakes, rivers, marshes, and dams across eastern and southern Africa from Ethiopia and Uganda south to the Cape. Tolerates agricultural impoundments and urban wetlands. Largely sedentary.
Greater White-fronted Goose
Breeds on Arctic and subarctic tundra and peatlands. Winters on estuaries, agricultural fields, freshwater marshes, and flooded meadows across Europe, Asia, and North America. One of the most widespread geese.
Song & Call Comparison
Yellow-billed Duck
Female gives a loud, descending quacking series; male utters a soft, raspy rehb note. The female's strong quacking call is the dominant sound at sub-Saharan African wetlands.
Greater White-fronted Goose
A loud, laughing 'kow-lyuk' or musical 'wah-wah'. Gives a distinctive high-pitched yodeling quality lacking in Greylag. Highly vocal in large winter flocks.
Geographic Range & Migration
Yellow-billed Duck
Found across sub-Saharan Africa from Senegal to Ethiopia and south to South Africa. Sedentary in freshwater wetlands.
Greater White-fronted Goose
Breeds in the potholes region of the northern Great Plains; winters in the southern United States and along the Gulf Coast.
Estado de conservação
Yellow-billed Duck
Greater White-fronted Goose
How to Tell Them Apart
Yellow-billed Duck
Brown body with scaly pale-edged feathers; head brown with paler face and throat. Diagnostic bright yellow bill with black central stripe. Iridescent green-and-black speculum with white borders. Sexes similar.
Greater White-fronted Goose
Brown-gray body with white forehead patch bordered by white band at bill base. Underparts with bold irregular black bars on belly. Orange bill; orange-yellow legs. Juveniles lack white front and …
About These Birds
Yellow-billed Duck
O pato-amarelo é um pato dabbling de tamanho médio encontrado na África subsariana. Distingue-se pelo seu bico amarelo brilhante, que lhe dá o nome comum. A plumagem é castanha mosqueada com marcações nas asas verdes iridescentes. Habita uma ampla variedade de habitats de água doce, incluindo lagos, pântanos, rios e arrozais. É um dos patos mais comuns e amplamente distribuídos em África.
Greater White-fronted Goose
O ganso-de-testa-branca é um ganso cinzento médio com uma característica faixa branca na frente da cabeça e barras pretas irregulares no ventre. Tem distribuição circumolar na tundra ártica onde cria, hibernando mais ao sul. As duas subespécies principais diferem no tamanho do bico e hibernam em diferentes regiões. Alimenta-se de plantas de tundra durante a criação e de pasto e culturas nas suas áreas de hibernada. É uma espécie cinegética amplamente caçada.