New Zealand Scaup vs Brent Goose

Aythya novaeseelandiae comparado con Branta bernicla

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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
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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.

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Song & Call Comparison

New Zealand Scaup

Canto

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

Canto

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.

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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.

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Estado de conservación

Least Concern

New Zealand Scaup

Least Concern

Brent Goose

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How to Tell Them Apart

New Zealand Scaup

Plumaje

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

Plumaje

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.

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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.

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