Wandering Whistling-duck vs Cotton Pygmy-goose
Dendrocygna arcuata เปรียบเทียบกับ Nettapus coromandelianus
Side-by-Side Comparison
| คุณสมบัติ | Wandering Whistling-duck | Cotton Pygmy-goose |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Dendrocygna arcuata | Nettapus coromandelianus |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 37.2 cm (14.6 in) | 31.7 cm (12.5 in) |
| น้ำหนัก | 779.5 g (27.50 oz) | 343.5 g (12.12 oz) |
| อาหาร | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … | Feeds on aquatic invertebrates, seeds, and plant material; dabbles in shallow water; invertebrate diet peaks … |
| จำนวนไข่ | 6-15 | 6-18 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Wandering Whistling-duck only
ไม่มี
Cotton Pygmy-goose 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.
Cotton Pygmy-goose
Freshwater lakes, ponds, slow rivers, and rice paddies with aquatic vegetation from India east through Southeast Asia, China, and New Guinea to northern and eastern Australia. Nests in tree holes near water.
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.
Cotton Pygmy-goose
Male emits a rapid, clucking chatter resembling a toy rattle; female responds with soft, muffled quacks. In flight both sexes produce a distinctive whistling wing-beat.
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.
Cotton Pygmy-goose
Breeds in northern Eurasia; winters in the tropics of Africa and Asia. Migratory; routes cross through the Middle East.
สถานะการอนุรักษ์
Wandering Whistling-duck
Cotton Pygmy-goose
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.
Cotton Pygmy-goose
Males white below and white-faced with dark green crown and collar; black back with iridescent green gloss; white wing bar conspicuous in flight. Females brown-gray with pale supercilium. Tiny; perches …
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.
Cotton Pygmy-goose
A tiny duck with males having striking white head and underparts, black back, and green iridescence on the crown. Found from India to Australia. Perches on aquatic vegetation and nests in tree hollows. Feeds on water lily seeds and aquatic plants. One of the world's smallest ducks.