Wandering Whistling-duck vs Black-bellied Whistling-duck
Dendrocygna arcuata в сравнении с Dendrocygna autumnalis
Side-by-Side Comparison
| Характеристика | Wandering Whistling-duck | Black-bellied Whistling-duck |
|---|---|---|
| Научное название | Dendrocygna arcuata | Dendrocygna autumnalis |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 37,2 cm (14.6 in) | 48,2 cm (19.0 in) |
| Масса | 779,5 g (27.50 oz) | 757,9 g (26.73 oz) |
| Питание | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes and agricultural fields eating … |
| Размер кладки | 6-15 | 9-18 |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Wandering Whistling-duck only
Нет
Black-bellied Whistling-duck only
Нет
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
Black-bellied Whistling-duck
Freshwater wetlands, ponds, lake margins, flooded fields, and wooded swamps from the southern United States and Mexico through Central America to Ecuador, Bolivia, and Argentina. Uses nest boxes readily.
Song & Call Comparison
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
Black-bellied Whistling-duck
A high, reedy whistle 'pe-che-che-ne' given in flight. Flocks produce a continuous whistling chorus. Also gives a squeaky 'whe-eee' contact call while swimming.
Geographic Range & Migration
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
Black-bellied Whistling-duck
Inhabits freshwater marshes and riverbanks from southeastern Brazil to northern Argentina and Bolivia. Sedentary; locally common.
Охранный статус
Wandering Whistling-duck
Black-bellied Whistling-duck
How to Tell Them Apart
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. Sexes similar.
Black-bellied Whistling-duck
Gray head with brown cap and chestnut breast; black belly is distinctive. Wings show broad white patch in flight. Coral-pink bill and long pink legs. Upright posture. Sexes similar.
About These Birds
Wandering Whistling-duck
A medium-sized whistling-duck with rufous-brown body, dark brown back, pale buff underparts, and a chestnut collar. Found in tropical wetlands from Indonesia to Australia and Pacific islands. Highly social and nomadic. Forages by dabbling and diving in shallow freshwater.
Black-bellied Whistling-duck
A boldly patterned whistling-duck with a bright red bill, chestnut-and-black body, broad white wing stripe, and a distinctive whistling call. Common in freshwater wetlands from the southern United States to central South America. Nests in tree cavities. Often perches in trees—unusual for waterfowl.