Campbell Teal vs African Black Duck
Anas nesiotis 比較対象 Anas sparsa
Side-by-Side Comparison
| 属性 | Campbell Teal | African Black Duck |
|---|---|---|
| 学名 | Anas nesiotis | Anas sparsa |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 24.4 cm (9.6 in) | 49.5 cm (19.5 in) |
| 体重 | 358.75 g (12.65 oz) | 996.8333333333334 g (35.16 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates in coastal and freshwater habitats; diet varies with season. | Eats molluscs, crustaceans, and aquatic invertebrates; dives in coastal and freshwater habitats; diet heavier in … |
| 一腹卵数 | 5-6 | 4-9 |
| Population Trend | — | — |
Habitat Comparison
Campbell Teal
Restricted to Campbell Island and Dent Island in the subantarctic New Zealand group. Dense tussock grassland, rocky shores, and freshwater streams. Nocturnal or crepuscular. Highly sedentary.
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.
Song & Call Comparison
Campbell Teal
Female produces a very soft quacking note; male gives a faint squeak. Near-silent; rarely vocalizes; the reduced call apparatus mirrors the species' severely limited wingspan and near-flightlessness.
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.
Geographic Range & Migration
Campbell Teal
Breeds in sub-Arctic freshwater lakes of Canada; winters along the Pacific coast from Alaska to Baja California.
African Black Duck
Resident across South and Southeast Asia, from India to southern China and the Philippines. Non-migratory in most of its range.
保全状況
Campbell Teal
African Black Duck
How to Tell Them Apart
Campbell Teal
Very dark brown plumage; males have iridescent green head gloss and white eye-ring. Females dark brown with white eye-ring. Flightless; tiny vestigial wings. Recovered from near-extinction on Campbell Island, New …
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 …
About These Birds
Campbell Teal
キャンベルティールはニュージーランドのキャンベル島に固有の飛べないカモです。マガモに近縁ですが、飛行能力を失った島嶼種です。島の湿地や草地に生息し、無脊椎動物や植物を採食します。繁殖キャプティブプログラムにより絶滅の危機から回復しました。
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。