Black-bellied Whistling-duck vs Spotted Whistling-duck
Dendrocygna autumnalis 比較対象 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | Black-bellied Whistling-duck | Spotted Whistling-duck |
|---|---|---|
| 学名 | Dendrocygna autumnalis | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 48.2 cm (19.0 in) | 41.3 cm (16.3 in) |
| 体重 | 757.9 g (26.73 oz) | 677.5 g (23.90 oz) |
| 食性 | 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 … |
| 一腹卵数 | 9-18 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Black-bellied Whistling-duck only
None
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.
保全状況
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
ブラックベリードウィスリングダックは北中米から南米北部に分布するツリーダックです。赤い嘴と飛翔時の大きな白い翼斑が目立ちます。湿地、池、稲田、木の茂った水辺に生息し、草の種子を主に採食します。
Spotted Whistling-duck
スポッテドウィスリングダックはインドネシア、フィリピン、パプアニューギニアに分布するツリーダックです。白い斑点のある褐色の羽毛が特徴で、夜間に特徴的な笛のような声でさえずります。熱帯の湿地、稲田、マングローブ林に生息し、草の種子や水草を採食します。