New Zealand Scaup vs Brent Goose
Aythya novaeseelandiae comparado con Branta bernicla
Side-by-Side Comparison
| Atributo | New Zealand Scaup | Brent Goose |
|---|---|---|
| Nombre científico | Aythya novaeseelandiae | Branta bernicla |
| Orden | Anseriformes | Anseriformes |
| Familia | Anatidae | Anatidae |
| Estado de conservación | Least Concern | Least Concern |
| Longitud | — | — |
| Envergadura | 35,4 cm (13.9 in) | 63,9 cm (25.2 in) |
| Peso | 645,5 g (22.77 oz) | 1335,0 g (47.09 oz) |
| Dieta | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by benthic hard-shelled prey in coastal … | Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … |
| Tamaño de la puesta | 2-13 | 1-10 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
New Zealand Scaup only
Ninguno
Brent Goose only
New Zealand Scaup
Deep freshwater lakes, reservoirs, and large rivers across both main islands of New Zealand, particularly on high-country glacial lakes. Dives to depths of over 3 m for food. Forms large flocks in winter.
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
New Zealand Scaup
Male produces a low, soft wheeze; female gives a short, harsh quack. Relatively quiet; subdued vocalizations suit this diving duck of deep, clear New Zealand lakes and reservoirs.
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
New Zealand Scaup
Breeds in the boreal forests of Canada; winters on large lakes and coastal bays across the southern United States.
Brent Goose
Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.
Estado de conservación
New Zealand Scaup
Brent Goose
How to Tell Them Apart
New Zealand Scaup
Males entirely black with green iridescence on head; yellow eye; dark blue-gray bill. Females dark brown with white face patches around bill base. White wing stripe in flight. New Zealand …
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
New Zealand Scaup
El porrón de Nueva Zelanda o papango es un pato buceador endémico de Nueva Zelanda, donde está en peligro de extinción. El macho tiene los ojos amarillos y el plumaje oscuro negro-café; la hembra es marrón con mejillas blancas. Antiguamente más amplio en su distribución, hoy persiste principalmente en el lago Rotorua y otras zonas de la Isla del Norte, gracias a programas de recuperación activos.
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.