Canvasback vs Brent Goose
Aythya valisineria comparado con Branta bernicla
Side-by-Side Comparison
| Atributo | Canvasback | Brent Goose |
|---|---|---|
| Nombre científico | Aythya valisineria | Branta bernicla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 44,7 cm (17.6 in) | 63,9 cm (25.2 in) |
| Peso | 1223,25 g (43.15 oz) | 1335,0 g (47.09 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet dominated by … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| Tamaño de la puesta | 2-16 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Canvasback
Breeds on prairie potholes and boreal lakes across western North America. Winters on large open lakes, reservoirs, estuaries, and Chesapeake Bay. Sensitive to loss of prairie wetlands.
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
Canvasback
Male produces a low, cooing purr; female gives a harsh, rolling quacking series. Males whisper-call in rolling, cooing notes during courtship; female's harsh quacking is emphatic on North American 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
Canvasback
Breeds in wooded wetlands of Canada and the northern United States; winters in the southern US and Central America.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Estado de conservación
Canvasback
Brent Goose
How to Tell Them Apart
Canvasback
Males have rich chestnut-red head and neck; black breast; pale canvas-gray body; white flanks. Sloping forehead profile with dark red bill and red eye. Females gray-brown with reddish-brown head. Dimorphic …
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
Canvasback
La porrón del lirio acuático o canvasback es un elegante pato buceador de América del Norte reconocible por la cabeza de perfil en pendiente inclinada y el largo pico negro del macho. El macho tiene la cabeza y el cuello de color rojo óxido, el pecho negro y el cuerpo blanco. Depende principalmente de la vegetación acuática, especialmente del apio de agua, en sus cuarteles de invierno.
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.