New Zealand Scaup vs Spotted Whistling-duck
Aythya novaeseelandiae 对比 Dendrocygna guttata
Side-by-Side Comparison
| 属性 | New Zealand Scaup | Spotted Whistling-duck |
|---|---|---|
| 学名 | Aythya novaeseelandiae | Dendrocygna guttata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 35.4 cm (13.9 in) | 41.3 cm (16.3 in) |
| 体重 | 645.5 g (22.77 oz) | 677.5 g (23.90 oz) |
| 食性 | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by benthic hard-shelled prey in coastal … | Primarily herbivorous; grazes tundra grasses and sedges; winters on coastal marshes and farmland, switching to … |
| 产卵数 | 2-13 | 10-11 |
| Population Trend | — | — |
Habitat Comparison
New Zealand Scaup
Deep freshwater lakes, reservoirs, and large rivers across both main islands of New Zealand, particularly on high-country glacial lakes. Dives to depths of over 3 m for food. Forms large flocks in winter.
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
New Zealand Scaup
Male produces a low, soft wheeze; female gives a short, harsh quack. Relatively quiet; subdued vocalizations suit this diving duck of deep, clear New Zealand lakes and reservoirs.
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
New Zealand Scaup
Breeds in the boreal forests of Canada; winters on large lakes and coastal bays across the southern United States.
Spotted Whistling-duck
Ranges widely across sub-Saharan Africa in open woodland and savanna. Largely sedentary with local seasonal movements to water.
保护状况
New Zealand Scaup
Spotted Whistling-duck
How to Tell Them Apart
New Zealand Scaup
Males entirely black with green iridescence on head; yellow eye; dark blue-gray bill. Females dark brown with white face patches around bill base. White wing stripe in flight. New Zealand …
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
New Zealand Scaup
A small compact all-dark diving duck with a yellow eye in males, known in New Zealand as the 'black teal.' Endemic to New Zealand. The only native diving duck still widespread on both main islands. Gregarious; forms large flocks on deep mountain lakes.
Spotted Whistling-duck
斑树鸭是东南亚和西南太平洋的树鸭，分布于印度尼西亚、菲律宾、巴布亚新几内亚及澳大利亚北部。体羽深褐色，胸部和腹部具白色斑点，嘴灰黑色。栖息于热带雨林的湖泊、河流和湿地，以水生植物、种子和无脊椎动物为食，在树洞中营巢。