Ferruginous Duck vs Brent Goose
Aythya nyroca comparado con Branta bernicla
Side-by-Side Comparison
| Atributo | Ferruginous Duck | Brent Goose |
|---|---|---|
| Nombre científico | Aythya nyroca | Branta bernicla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Near Threatened | Least Concern |
| Longitud | — | — |
| Envergadura | 36,5 cm (14.4 in) | 63,9 cm (25.2 in) |
| Peso | 594,1666666666666 g (20.96 oz) | 1335,0 g (47.09 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal habitats; diet dominated by hard-shelled invertebrates. | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| Tamaño de la puesta | 4-17 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Ferruginous Duck
Freshwater lakes, marshes, and river deltas with dense emergent vegetation in southern Eurasia from central Europe east to Central Asia and China. Winters in the Mediterranean, South Asia, and sub-Saharan Africa.
Brent Goose
Breeds on high-Arctic tundra; winters on estuaries, coastal mudflats, saltmarshes, and sea-grass beds along Atlantic and Pacific coastlines. One of the most strictly coastal wintering geese.
Song & Call Comparison
Ferruginous Duck
Male emits a soft, wheeling purr; female gives a harsh, rapid quacking series. The male's quiet purring display call contrasts with the female's repeated, grating notes on Mediterranean marshes.
Brent Goose
A low, guttural 'rronk' or 'ronk-ronk' from flocks. Soft nasal calls in feeding groups. A subtle, understated call for a goose — less loud than most Anser geese.
Geographic Range & Migration
Ferruginous Duck
Breeds in boreal and sub-Arctic Canada; winters on the Atlantic coast from New England to the Gulf States.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Estado de conservación
Ferruginous Duck
Brent Goose
How to Tell Them Apart
Ferruginous Duck
Rich chestnut-brown head, neck and breast; white undertail conspicuous. White eye in males (brown in females). Dark back. Bold white wing stripe in flight. Compact and rounded. Males brighter chestnut; …
Brent Goose
Small; mostly black head, neck, and breast. Small white neck-patch on adults. Back dark brownish-gray; belly pale gray to white depending on subspecies. White undertail coverts. Sexes similar.
About These Birds
Ferruginous Duck
El porrón pardo es un pequeño pato buceador con el macho de color castaño rojizo intenso con el ojo blanco. Habita en lagos, estanques y marismas con vegetación densa de juncos y espadañas en Europa, Asia y norte de África. Está clasificado como casi amenazado debido al drenaje de los humedales y la caza. Los nidos los construye en vegetación densa sobre el agua.
Brent Goose
El barnacla brenta o barnacla negruzca es un pequeño ganso marino de color negro y gris oscuro con un pequeño parche blanco a los lados del cuello. Cría en la tundra ártica y migra a zonas costeras templadas del hemisferio norte en invierno, donde se alimenta principalmente de zostera, un tipo de hierba marina. Es el único ganso que pasa el invierno en ambientes exclusivamente marinos.