Black-bellied Whistling-duck vs Spotted Whistling-duck
Dendrocygna autumnalis เปรียบเทียบกับ Dendrocygna guttata
Side-by-Side Comparison
| คุณสมบัติ | Black-bellied Whistling-duck | Spotted Whistling-duck |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Dendrocygna autumnalis | Dendrocygna guttata |
| อันดับ | Anseriformes | Anseriformes |
| วงศ์ตระกูล | Anatidae | Anatidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 48.2 cm (19.0 in) | 41.3 cm (16.3 in) |
| น้ำหนัก | 757.9 g (26.73 oz) | 677.5 g (23.90 oz) |
| อาหาร | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes and agricultural fields eating … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| จำนวนไข่ | 9-18 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
ถิ่นที่อยู่อาศัยร่วมกัน
Black-bellied Whistling-duck only
ไม่มี
Spotted Whistling-duck only
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.
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
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.
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
Black-bellied Whistling-duck
Inhabits freshwater marshes and riverbanks from southeastern Brazil to northern Argentina and Bolivia. Sedentary; locally common.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
สถานะการอนุรักษ์
Black-bellied Whistling-duck
Spotted Whistling-duck
How to Tell Them Apart
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.
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
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.
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.