Campbell Teal vs Wandering Whistling-duck
Anas nesiotis 比較対象 Dendrocygna arcuata
Side-by-Side Comparison
| 属性 | Campbell Teal | Wandering Whistling-duck |
|---|---|---|
| 学名 | Anas nesiotis | Dendrocygna arcuata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 24.4 cm (9.6 in) | 37.2 cm (14.6 in) |
| 体重 | 358.75 g (12.65 oz) | 779.5 g (27.50 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates in coastal and freshwater habitats; diet varies with season. | Eats grasses, sedges, and aquatic plants in tundra; winter diet of coastal salt marsh grasses … |
| 一腹卵数 | 5-6 | 6-15 |
| 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.
Wandering Whistling-duck
Tropical freshwater marshes, flooded grasslands, swamps, and lake margins from the Philippines and Indonesia through Papua New Guinea to northern and eastern Australia. Nomadic following wet season flooding.
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.
Wandering Whistling-duck
A soft whistle 'whi-whi-whi' in flight. Less vocal than other whistling-ducks; flocks tend to be quieter. Given at dawn and dusk during flight to roosting or feeding areas.
Geographic Range & Migration
Campbell Teal
Breeds in sub-Arctic freshwater lakes of Canada; winters along the Pacific coast from Alaska to Baja California.
Wandering Whistling-duck
Breeds in Arctic and subarctic regions; winters at sea around the Antarctic pack ice, one of the longest migrations known.
保全状況
Campbell Teal
Wandering Whistling-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 …
Wandering Whistling-duck
Rich chestnut-brown head and neck; dark brown back. Flanks rufous with pale buff streaks and dark spots. Belly blackish. Long, dark pinkish legs. Upright posture typical of whistling-ducks. Sexes similar.
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。
Wandering Whistling-duck
ワンデリングウィスリングダックは東南アジアからオーストラリアにかけて分布するツリーダックです。栗色の羽毛と長い首が特徴で、群れで移動します。湿地、稲田、水草に覆われた湖に生息し、水草、種子、藻類を採食します。