Mottled Duck vs Spotted Whistling-duck
Anas fulvigula 比較対象 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | Mottled Duck | Spotted Whistling-duck |
|---|---|---|
| 学名 | Anas fulvigula | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 48.9 cm (19.3 in) | 41.3 cm (16.3 in) |
| 体重 | 1027.5 g (36.24 oz) | 677.5 g (23.90 oz) |
| 食性 | Dives for freshwater fish and aquatic invertebrates; saw-edged bill grips prey; diet strongly fish-dominated year-round. | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 一腹卵数 | 9-13 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
Mottled Duck
Coastal freshwater and brackish marshes, wet prairies, and gulf coast wetlands in Florida and along the Gulf of Mexico coast to Texas. Non-migratory year-round resident. Threatened by Mallard hybridization.
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
Mottled Duck
Female gives a loud, Mallard-like quacking series; male produces a soft, nasal note. Alarm call is a rapid, emphatic quacking burst; flocks generate a loud chorus on Gulf Coast marshes.
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
Mottled Duck
Breeds across sub-Arctic and boreal regions of Eurasia; winters in sub-Saharan Africa and South Asia.
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
Mottled Duck
Spotted Whistling-duck
How to Tell Them Apart
Mottled Duck
Rich mottled brown plumage with buff-edged feathers and pale buff head and throat. Dark crown and eye stripe. Iridescent blue speculum with white border. Yellow-orange bill. Sexes similar. Resembles non-breeding …
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
Mottled Duck
フロリダガモはフロリダ半島とメキシコ湾岸に生息する留鳥のカモです。マガモに非常に似ていますが、嘴が黄色く、一般に南方に移動しない特徴があります。湿地、沼地、草地の水辺に生息し、植物や無脊椎動物を食べます。マガモとの交雑が懸念されています。
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。