Wandering Whistling-duck vs Smew
Dendrocygna arcuata so với Mergellus albellus
Side-by-Side Comparison
| Thuộc Tính | Wandering Whistling-duck | Smew |
|---|---|---|
| Tên Khoa Học | Dendrocygna arcuata | Mergellus albellus |
| 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) | 37,5 cm (14.8 in) |
| Khối Lượng | 779,5 g (27.50 oz) | 658,75 g (23.24 oz) |
| Chế Độ Ăn | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Dives for small fish, aquatic insects, and crustaceans in freshwater and coastal habitats. Uses serrated … |
| Số Trứng | 6-15 | 5-11 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Wandering Whistling-duck only
Không
Smew only
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.
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.
Smew
Male gives a soft, crow-like krr note; female produces a grating, rasping call. Both sexes are relatively quiet; the male's harsh, crow-like call is surprisingly low for such a small …
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.
Smew
Breeds in boreal forests of northern Europe and Siberia. Winters on large lakes and coasts from western Europe east to Japan and China.
Tình Trạng Bảo Tồn
Wandering Whistling-duck
Smew
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.
Smew
Male is largely white with black eye patch, black lines on back, and fine black lines on flanks creating a cracked-ice pattern. Female has chestnut-red head, white cheeks, and grey …
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.
Smew
A small merganser (~660 g) in family Anatidae, males predominantly white with fine black markings and a small crest. Breeds in boreal forests of northern Eurasia near rivers and lakes, nesting in tree holes; winters on freshwater and coastal waters in central and western Europe. Feeds on small fish and aquatic invertebrates. Least Concern.