African Black Duck vs Red-breasted Goose
Anas sparsa 比較対象 Branta ruficollis
Side-by-Side Comparison
| 属性 | African Black Duck | Red-breasted Goose |
|---|---|---|
| 学名 | Anas sparsa | Branta ruficollis |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 49.5 cm (19.5 in) | 69.1 cm (27.2 in) |
| 体重 | 996.8333333333334 g (35.16 oz) | 1253.25 g (44.21 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 4-9 | 3-10 |
| Population Trend | — | — |
Habitat Comparison
African Black Duck
Fast-flowing rocky rivers and streams, mountain gorges, and waterfalls from sea level to 4,000 m across sub-Saharan Africa from Ethiopia and Kenya south to the Cape. Requires clear turbulent water with boulders.
Red-breasted Goose
Breeds on river-terrace tundra in northwestern Siberia, often near Peregrine or Rough-legged Buzzard nests for protection. Winters on agricultural steppes and lake margins around the Black Sea and Caspian Sea.
Song & Call Comparison
African Black Duck
Produces a harsh, resonant quacking call; alarm is a loud, emphatic quack repeated rapidly. Both sexes call with strong quacking; pairs duet with synchronized calls along African rivers.
Red-breasted Goose
A high-pitched, rapid 'kik-kik-kik' call. More vocal during migration; flocks give constant chattering. Considered a more squeaky, high-pitched call than other Branta geese.
保全状況
African Black Duck
Red-breasted Goose
How to Tell Them Apart
African Black Duck
Dark blackish-brown plumage with bold white spots on back and scapulars. Iridescent blue-green speculum with white borders. Head dark with pale spots. Bill and legs dark gray. Sexes similar. Fast-flowing …
Red-breasted Goose
Unmistakable; vivid chestnut-red patch on face and breast bordered by white stripes. Black crown, back, wings, and belly. White flank stripe and undertail. Compact and striking. Sexes similar.
About These Birds
African Black Duck
アフリカンブラックダックはサハラ以南のアフリカの急流河川に生息する特殊なカモです。暗褐色の羽毛と白い斑点が特徴で、水流の速い清澄な渓流を好みます。繁殖期には縄張り意識が強く、ペアで生活します。急流の水生昆虫や甲殻類を主食とします。
Red-breasted Goose
アカノドガンはロシア北部のツンドラで繁殖し、ルーマニアや中央アジアで越冬する美しいガンです。赤褐色の喉と頬、白と黒の模様が特徴的です。草地や農地で採食します。絶滅危惧種に指定されており、越冬地での生息地破壊が主な脅威です。