Andaman Teal vs Black Swan
Anas albogularis 比較対象 Cygnus atratus
Side-by-Side Comparison
| 属性 | Andaman Teal | Black Swan |
|---|---|---|
| 学名 | Anas albogularis | Cygnus atratus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Near Threatened | Least Concern |
| 体長 | — | 130.0 cm (51.2 in) |
| 翼開長 | 37.4 cm (14.7 in) | 190.0 cm (74.8 in) |
| 体重 | 370.0 g (13.05 oz) | 6200.0 g (218.70 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates by diving; diet dominated by hard-shelled benthic invertebrates. | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| 一腹卵数 | 7-8 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Andaman Teal
Freshwater pools, rice paddies, coastal marshes, and mangrove-fringed inlets on the Andaman and Nicobar Islands, Bay of Bengal. Non-migratory; restricted entirely to this island group.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Andaman Teal
Female produces a soft, descending quacking series; male gives a subdued whistle. Low-pitched, unobtrusive calls rarely heard; this Near Threatened island teal is generally quiet.
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
Andaman Teal
Breeds in boreal forest wetlands of central Canada; winters along the Atlantic coast from New England to the Caribbean.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
保全状況
Andaman Teal
Black Swan
How to Tell Them Apart
Andaman Teal
Dark brown mottled plumage; pale throat and face contrasting with dark crown. Iridescent green speculum. Bill gray; legs grayish. Sexes similar. Endemic to Andaman Islands; near-threatened island population.
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
Andaman Teal
A small dark brown teal with a white throat and chin patch, green speculum, and dark bill. Endemic to the Andaman and Nicobar Islands in the Bay of Bengal. Vulnerable; threatened by habitat loss and hunting. One of the least-known ducks in Asia.
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。