Coscoroba Swan vs Spotted Whistling-duck
Coscoroba coscoroba เปรียบเทียบกับ Dendrocygna guttata
Side-by-Side Comparison
| คุณสมบัติ | Coscoroba Swan | Spotted Whistling-duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Coscoroba coscoroba | Dendrocygna guttata |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 84.2 cm (33.1 in) | 41.3 cm (16.3 in) |
| น้ำหนัก | 4200.0 g (148.15 oz) | 677.5 g (23.90 oz) |
| อาหาร | Eats seeds, aquatic plants, and invertebrates; dabbles and upends in shallow water; diet more invertebrate-heavy … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| จำนวนไข่ | 4-9 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Coscoroba Swan only
ไม่มี
Spotted Whistling-duck only
Coscoroba Swan
Freshwater lakes, marshes, lagoons, and flooded grasslands from southern Brazil through Uruguay, Chile, and Argentina to Tierra del Fuego. Partially migratory; moves northward in winter. Nests in reedy margins.
Spotted Whistling-duck
Freshwater wetlands, rice fields, streams, and forest pools in New Guinea, Sulawesi, the Philippines, and Moluccas. Often found near forested rivers and seasonal swamps at low elevations.
Song & Call Comparison
Coscoroba Swan
A bugling, honking 'coscoroba' call — giving the species its onomatopoeic name. Loud and far-carrying. Less commonly heard than northern hemisphere swans.
Spotted Whistling-duck
A musical, high whistle similar to other whistling-ducks. Call is softer and less far-carrying than White-faced or Black-bellied species. Given in flight and on water.
Geographic Range & Migration
Coscoroba Swan
Breeds in western North American prairies and parklands; winters in California, the Southwest, and northern Mexico.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
สถานะการอนุรักษ์
Coscoroba Swan
Spotted Whistling-duck
How to Tell Them Apart
Coscoroba Swan
Entirely white plumage except black wingtips visible in flight. Bright red bill and red legs and feet. Red eye-ring. More goose-like than true swans. Juvenile has brownish wash. Sexes similar.
Spotted Whistling-duck
Dark brown above; head and neck dark brown. Underparts heavily spotted white on dark brown ground, giving spotted appearance. Flanks with bold white spots. Pink-red bill and legs. Sexes similar.
About These Birds
Coscoroba Swan
The smallest swan and the only member of its genus, differing from true swans with a more goose-like head, red-pink bill and legs, and all-white plumage with black wingtips. Found in southern South America. Swims gracefully and grazes shoreline vegetation. Loud coscoroba call is distinctive.
Spotted Whistling-duck
A small dark brown whistling-duck with bold white spots on its flanks, orange-red bill and legs, and a pale face. Found in tropical wetlands of New Guinea, the Philippines, and Indonesia. Often found near freshwater streams and flooded grassland. Less gregarious than other whistling-ducks.