Wandering Whistling-duck vs Chiloe Wigeon
Dendrocygna arcuata so với Mareca sibilatrix
Side-by-Side Comparison
| Thuộc Tính | Wandering Whistling-duck | Chiloe Wigeon |
|---|---|---|
| Tên Khoa Học | Dendrocygna arcuata | Mareca sibilatrix |
| Bộ | Anseriformes | Anseriformes |
| Họ | Anatidae | Anatidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 37,2 cm (14.6 in) | 49,0 cm (19.3 in) |
| Khối Lượng | 779,5 g (27.50 oz) | 922,8333333333334 g (32.55 oz) |
| Chế Độ Ăn | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dabbles for seeds and aquatic invertebrates; diet varies between plant matter and invertebrates seasonally in … |
| Số Trứng | 6-15 | 2-13 |
| Population Trend | — | — |
Habitat Comparison
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.
Chiloe Wigeon
Lakes, rivers, freshwater marshes, and coastal lagoons in southern South America from southern Peru and Bolivia south through Chile and Argentina to Tierra del Fuego and the Falkland Islands.
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.
Chiloe Wigeon
Male utters a short, melodious whistle; female gives a low purring note. Pairs and flocks call with clear piping exchanges across South American wetlands and coastal lagoons.
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.
Chiloe Wigeon
Found across Australia, New Guinea, Indonesia, and the Philippines. Nomadic in drier areas; resident in well-watered regions.
Tình Trạng Bảo Tồn
Wandering Whistling-duck
Chiloe Wigeon
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.
Chiloe Wigeon
Iridescent dark green head with white forehead blaze. Black and white barred flanks; rufous breast; white belly. White forewing patch. Legs blue-gray. Females similar but duller. South American temperate species.
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.
Chiloe Wigeon
A large boldly patterned wigeon with a metallic green head, white face, black breast, grey flanks with white barring, and a bright orange-yellow bill. Endemic to southern South America. Highly territorial; pairs defend lake territories. Named for Chiloé Island in Chile.