White-faced Whistling-duck vs Mallard
Dendrocygna viduata 比較対象 Anas platyrhynchos
Side-by-Side Comparison
| 属性 | White-faced Whistling-duck | Mallard |
|---|---|---|
| 学名 | Dendrocygna viduata | Anas platyrhynchos |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 58.0 cm (22.8 in) |
| 翼開長 | 42.9 cm (16.9 in) | 90.0 cm (35.4 in) |
| 体重 | 689.5 g (24.32 oz) | 1100.0 g (38.80 oz) |
| 食性 | Grazes subarctic tundra grasses and sedges; winters on coastal salt marshes eating saltmarsh grasses and … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 一腹卵数 | 4-16 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
White-faced Whistling-duck
Freshwater lakes, marshes, rice paddies, flooded fields, and slow-moving rivers in sub-Saharan Africa and tropical South America. Tolerates a wide range of modified wetlands. Nomadic, following water availability.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
White-faced Whistling-duck
A clear, 3-syllable whistle 'wee-wee-WEE' — the origin of 'whistling-duck'. Given in noisy flocks during flight. Also gives a softer 'de-de-de' contact call on water.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
White-faced Whistling-duck
Found in floodplains and wetlands of the Llanos in Venezuela and eastern Colombia. Sedentary and locally nomadic in wet savannas.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
保全状況
White-faced Whistling-duck
Mallard
How to Tell Them Apart
White-faced Whistling-duck
Distinctive white face and throat contrasting with black hindneck. Breast chestnut; sides and flanks barred black and white. Back brown. Long gray legs. Sexes identical; upright whistling-duck posture.
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
About These Birds
White-faced Whistling-duck
ホワイトフェースウィスリングダックはアフリカとアメリカ熱帯地域に広く分布するツリーダックです。白い顔と栗色の胸が特徴的です。湿地、稲田、草原の池に生息し、水草の種子、無脊椎動物、藻類を採食します。
Mallard
世界で最も一般的なカモ。雄は光沢のある緑色の頭、白い首輪、栗色の胸が特徴。体長50〜65cm。ほぼ世界中の湖、川、池、湿地に生息。雑食性で植物や無脊椎動物を食べる。多くの家禽カモの祖先。低危険種。