New Zealand Scaup vs Mandarin Duck
Aythya novaeseelandiae 比較対象 Aix galericulata
Side-by-Side Comparison
| 属性 | New Zealand Scaup | Mandarin Duck |
|---|---|---|
| 学名 | Aythya novaeseelandiae | Aix galericulata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | 44.0 cm (17.3 in) |
| 翼開長 | 35.4 cm (13.9 in) | 70.0 cm (27.6 in) |
| 体重 | 645.5 g (22.77 oz) | 570.0 g (20.11 oz) |
| 食性 | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by benthic hard-shelled prey in coastal … | Seeds, acorns, grains, aquatic plants, insects, snails, and small fish. Forages by dabbling, walking, and … |
| 一腹卵数 | 2-13 | 7-14 |
| 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.
Mandarin Duck
Wooded lakes, rivers, and ponds surrounded by dense forest. Unlike most ducks, regularly perches in trees and nests in tree cavities.
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.
Mandarin Duck
Male gives a low whistled 'hib' or 'weep'. Female utters a soft quacking 'kek'. Generally quiet and secretive. No loud territorial song; vocalizations subtle and brief.
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.
Mandarin Duck
Native to East Asia including eastern Russia, China, Japan, and Korea. Feral populations established in Britain and western Europe.
保全状況
New Zealand Scaup
Mandarin Duck
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 …
Mandarin Duck
Breeding males have an elaborate pattern of orange, green, white, and purple with distinctive orange sail feathers on the back. Females are grey-brown with a white eye-ring and stripe.
Small red bill in breeding males, pinkish in females
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。
Mandarin Duck
オシドリ。東アジア原産の美しいカモ。雄は鮮やかなオレンジ色の「帆羽」と複雑な羽毛模様が特徴的。体長41〜49cm。森林の池や川に生息し、樹洞に巣を作る。ドングリや水草を食べる。低危険種。