Spotted Whistling-duck vs Scaly-sided Merganser
Dendrocygna guttata 比較対象 Mergus squamatus
Side-by-Side Comparison
| 属性 | Spotted Whistling-duck | Scaly-sided Merganser |
|---|---|---|
| 学名 | Dendrocygna guttata | Mergus squamatus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Endangered |
| 体長 | — | — |
| 翼開長 | 41.3 cm (16.3 in) | 51.2 cm (20.2 in) |
| 体重 | 677.5 g (23.90 oz) | 1145.8 g (40.42 oz) |
| 食性 | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … | Dives for fish in fast-flowing East Asian rivers. Endangered; highly piscivorous with serrated bill adapted … |
| 一腹卵数 | 10-11 | 4-14 |
| Population Trend | — | — |
Habitat Comparison
共通生息地
Spotted Whistling-duck only
Scaly-sided Merganser only
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
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.
Scaly-sided Merganser
Male gives a quiet, low grunting call; female produces a guttural, croaking series. Endangered; calls are poorly known; similar to Red-breasted Merganser but quieter in Manchurian forest rivers.
Geographic Range & Migration
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
Scaly-sided Merganser
Breeds in southern Russia, northern China, and the Russian Far East. Winters in southern China and Korea. Found on fast-flowing forested rivers.
保全状況
Spotted Whistling-duck
Scaly-sided Merganser
How to Tell Them Apart
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.
Scaly-sided Merganser
Male has iridescent dark green head with long flat crest, white body with distinctive black scaly pattern on flanks, and black back with white patches. Female has brownish-red crested head …
About These Birds
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。
Scaly-sided Merganser
カワアイサはロシア極東と中国東北部の急流河川に繁殖し、東アジアで越冬する潜水性カモです。鱗状の羽毛パターンが名前の由来で、雄は緑光沢の黒い頭部と赤い嘴を持ちます。清澄な河川で魚を潜って採食します。絶滅危惧種です。