Brent Goose vs Brazilian Merganser

Branta bernicla comparado con Mergus octosetaceus

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Side-by-Side Comparison

Atributo Brent Goose Brazilian Merganser
Nombre científico Branta bernicla Mergus octosetaceus
Orden Anseriformes Anseriformes
Familia Anatidae Anatidae
Estado de conservación Least Concern Critically Endangered
Longitud
Envergadura 63,9 cm (25.2 in) 39,2 cm (15.4 in)
Peso 1335,0 g (47.09 oz) 827,6666666666666 g (29.20 oz)
Dieta Primarily herbivorous; grazes aquatic plants, grasses, and sedges; swans upend in shallow water for submerged … Dives for small fish in fast-flowing South American rivers. Critically endangered; uses serrated bill to …
Tamaño de la puesta 1-10 5-8
Population Trend
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Habitat Comparison

Hábitats compartidos

Brent Goose only

Brazilian Merganser only

Ninguno

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

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.

Brazilian Merganser

Canto

Male produces a harsh, rasping call; female gives a guttural, grunting series. Critically endangered; quiet vocalizations suit its secretive lifestyle in fast-flowing Brazilian mountain rivers.

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Geographic Range & Migration

Brent Goose

Breeds across boreal and subarctic Canada and Alaska; winters in the southern United States, Mexico, and Central America.

Brazilian Merganser

Critically endangered; restricted to a few rivers in southern Brazil, Argentina, and Paraguay. Found on fast-flowing rivers in Atlantic Forest.

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Estado de conservación

Least Concern

Brent Goose

Critically Endangered

Brazilian Merganser

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How to Tell Them Apart

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.

Brazilian Merganser

Plumaje

Male has dark glossy greenish-black head with long shaggy crest; finely vermiculated grey body, white wing patch. Female similar but with rufous-chestnut wash on head and shorter crest.

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About These Birds

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.

Brazilian Merganser

El merganso brasileño es uno de los patos más amenazados del mundo, con menos de 250 individuos maduros que subsisten en ríos rápidos y limpios del interior del Brasil, con pequeñas poblaciones en Argentina y Paraguay. Tiene plumaje negro con los flancos rojizos en el macho. La deforestación, la contaminación y los proyectos hidroeléctricos han destruido gran parte de su hábitat.

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