New Zealand Scaup vs Mute Swan
Aythya novaeseelandiae 比較対象 Cygnus olor
Side-by-Side Comparison
| 属性 | New Zealand Scaup | Mute Swan |
|---|---|---|
| 学名 | Aythya novaeseelandiae | Cygnus olor |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 152.0 cm (59.8 in) |
| 翼開長 | 35.4 cm (13.9 in) | 235.0 cm (92.5 in) |
| 体重 | 645.5 g (22.77 oz) | 11000.0 g (388.01 oz) |
| 食性 | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by benthic hard-shelled prey in coastal … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 一腹卵数 | 2-13 | 5-7 |
| 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.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
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.
Mute Swan
Despite its name, not truly mute: gives hissing snorts and low grunting when threatened. Wings produce a loud rhythmic whistling throbbing sound 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.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
保全状況
New Zealand Scaup
Mute 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 …
Mute Swan
All-white plumage in adults. Cygnets are grey-brown, gradually whitening over the first year. Graceful S-curved neck posture is distinctive.
Orange bill with a prominent black knob at the base, larger in males
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。
Mute Swan
The mute swan is one of the heaviest flying birds, with males weighing up to 14 kg. Despite its name, it is not truly mute, producing hissing, grunting, and snorting sounds. Mute swans form lifelong pair bonds and their aggressive defense of nesting territory is well known.