American Black Duck vs Scaly-sided Merganser

Anas rubripes comparado con Mergus squamatus

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Side-by-Side Comparison

Atributo American Black Duck Scaly-sided Merganser
Nombre científico Anas rubripes Mergus squamatus
Orden Anseriformes Anseriformes
Familia Anatidae Anatidae
Estado de conservación Least Concern Endangered
Longitud
Envergadura 53,4 cm (21.0 in) 51,2 cm (20.2 in)
Peso 1211,25 g (42.73 oz) 1145,8 g (40.42 oz)
Dieta Eats fish and aquatic invertebrates; dives in coastal and freshwater habitats; diet shifts toward molluscs … Dives for fish in fast-flowing East Asian rivers. Endangered; highly piscivorous with serrated bill adapted …
Tamaño de la puesta 1-17 4-14
Population Trend
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Habitat Comparison

Hábitats compartidos

American Black Duck only

Ninguno

Scaly-sided Merganser only

Ninguno

American Black Duck

Freshwater and brackish wetlands in eastern North America from Atlantic Canada south along the coast to Georgia. Breeds in northern bogs and wetlands. Winters on coastal marshes, estuaries, and freshwater lakes.

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Song & Call Comparison

American Black Duck

Canto

Female produces a loud, deep quacking series; male gives a low, raspy grunt. Voice is deeper and huskier than a Mallard; pairs call powerfully across northeastern North American wetlands.

Scaly-sided Merganser

Canto

Male gives a quiet, low grunting call; female produces a guttural, croaking series. Endangered; calls are poorly known; similar to Red-breasted Merganser but quieter in Manchurian forest rivers.

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Geographic Range & Migration

American Black Duck

Breeds in the steppe zone of Central Asia; winters in South Asia, East Africa, and coastal Southeast Asia.

Scaly-sided Merganser

Breeds in southern Russia, northern China, and the Russian Far East. Winters in southern China and Korea. Found on fast-flowing forested rivers.

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Estado de conservación

Least Concern

American Black Duck

Endangered

Scaly-sided Merganser

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How to Tell Them Apart

American Black Duck

Plumaje

Sooty dark brown body; head and neck paler buff with dark streaking. Iridescent purple speculum without white border. Males have yellow-green bill; females olive with orange blotches. Silvery underwings in …

Scaly-sided Merganser

Plumaje

Male has iridescent dark green head with long flat crest, white body with distinctive black scaly pattern on flanks, and black back with white patches. Female has brownish-red crested head …

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About These Birds

American Black Duck

El pato negro americano es un gran pato de color marrón muy oscuro con una cabeza más clara y un llamativo espéculo alar púrpura. Habita en humedales del este de Norteamérica y se está hibridando cada vez más con el pato de collar introducido en su rango, lo que representa una amenaza para su pureza genética. Prefiere marismas costeras, pantanos boscosos y lagos tranquilos.

Scaly-sided Merganser

El merganso escamoso es un merganso del este de Asia en peligro de extinción que cría en el lejano oriente ruso y el nordeste de China. El macho tiene la cabeza de color verde-negro brillante con un largo moño y los flancos color crema finamente escamados. Habita en ríos y arroyos forestales limpios, y pasa el invierno en ríos del este y centro de China.

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