New Zealand Scaup vs Black Swan
Aythya novaeseelandiae 比較対象 Cygnus atratus
Side-by-Side Comparison
| 属性 | New Zealand Scaup | Black Swan |
|---|---|---|
| 学名 | Aythya novaeseelandiae | Cygnus atratus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 130.0 cm (51.2 in) |
| 翼開長 | 35.4 cm (13.9 in) | 190.0 cm (74.8 in) |
| 体重 | 645.5 g (22.77 oz) | 6200.0 g (218.70 oz) |
| 食性 | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by benthic hard-shelled prey in coastal … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| 一腹卵数 | 2-13 | 4-6 |
| Population Trend | — | — |
Size Comparison
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.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
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.
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
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.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
保全状況
New Zealand Scaup
Black Swan
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 …
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
About These Birds
New Zealand Scaup
ニュージーランドスカップはニュージーランドとその周辺の島々に固有の潜水性カモです。雄は緑光沢のある黒い頭部と黄色い目が特徴的です。深い湖、川、沿岸の水域に生息し、水生無脊椎動物、軟体動物、水草を潜って採食します。絶滅危惧種です。
Black Swan
コクチョウはかつてすべての白鳥は白いと信じていたヨーロッパ人に不可能と考えられており、帰納的推論の失敗の有名な哲学的な例となっている。西オーストラリア州の州の鳥。コクチョウは生涯続く番いの絆を形成し、両親が共同で抱卵と雛の世話を行う。