Greater White-fronted Goose vs Crested Shelduck
Anser albifrons comparado con Tadorna cristata
Side-by-Side Comparison
| Atributo | Greater White-fronted Goose | Crested Shelduck |
|---|---|---|
| Nombre científico | Anser albifrons | Tadorna cristata |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Critically Endangered |
| Longitud | — | — |
| Envergadura | 81,6 cm (32.1 in) | 59,8 cm (23.5 in) |
| Peso | 2471,0 g (87.16 oz) | 1235,0 g (43.56 oz) |
| Dieta | Dabbles for aquatic invertebrates, seeds, and plant material; diet shifts heavily toward invertebrates in breeding … | -- |
| Tamaño de la puesta | 3-9 | 10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Greater White-fronted Goose only
Crested Shelduck only
Ninguno
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.
Crested Shelduck
Historically known from coastal Korea, Siberia, and possibly Japan. Habitat preferences poorly known; specimens were collected near coasts and rivers. Possibly extinct.
Song & Call Comparison
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.
Crested Shelduck
Critically endangered; last confirmed sightings in 1971. No vocalizations reliably recorded. Presumed similar to related shelducks based on phylogeny but effectively unknown.
Geographic Range & Migration
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.
Crested Shelduck
Estado de conservación
Greater White-fronted Goose
Crested Shelduck
How to Tell Them Apart
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 …
Crested Shelduck
Critically rare; known from few specimens. Males dark green head with bushy crest; black and white body with chestnut flanks. Females have white facial markings and brown-barred body. Possibly extinct; …
About These Birds
Greater White-fronted Goose
El ánsar careto o ganso careto mayor es un ganso mediano de color pardo con una llamativa mancha blanca en la frente y barras negras en el vientre. Tiene un amplio rango de cría en la tundra ártica del hemisferio norte y migra a zonas templadas de Europa, Asia y América del Norte para pasar el invierno, donde a menudo se reúne en grandes bandadas en campos agrícolas.
Crested Shelduck
El tarro crestudo es una especie casi extinguida y extremadamente rara originaria de Corea, China y posiblemente Japón. Solo se conocen tres pieles de museo y avistamientos muy ocasionales en estado salvaje; no ha sido confirmada desde los años 1970. Tenía plumaje negro, blanco y verde con una cresta verde en la cabeza. Las causas de su probable extinción incluyen la caza y la pérdida de hábitat.