Chestnut Teal vs Mute Swan
Anas castanea 比較対象 Cygnus olor
Side-by-Side Comparison
| 属性 | Chestnut Teal | Mute Swan |
|---|---|---|
| 学名 | Anas castanea | 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 | 40.4 cm (15.9 in) | 235.0 cm (92.5 in) |
| 体重 | 662.25 g (23.36 oz) | 11000.0 g (388.01 oz) |
| 食性 | Eats molluscs, crustaceans, and aquatic invertebrates; dives in shallow water; diet heavier in molluscs in … | Submerged aquatic vegetation, algae, and grass. Feeds by upending in shallow water, reaching depths of … |
| 一腹卵数 | 5-17 | 5-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Chestnut Teal
Coastal and estuarine wetlands, saltmarshes, estuaries, and coastal freshwater lakes in southeastern and southwestern Australia. More closely tied to coastal habitats than most Australian ducks.
Mute Swan
Lakes, slow rivers, estuaries, and coastal lagoons. Often associated with parks and ornamental waters in Europe.
Song & Call Comparison
Chestnut Teal
Female produces a loud, emphatic quacking series; male gives a high, whistled note. The female's resonant quacking call is a familiar sound of southern Australian coastal wetlands.
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
Chestnut Teal
Breeds in the north-central prairies; winters along the Atlantic and Gulf coasts of the United States.
Mute Swan
Native to Europe and western Asia. Introduced to North America, South Africa, Australia, and New Zealand.
保全状況
Chestnut Teal
Mute Swan
How to Tell Them Apart
Chestnut Teal
Strong dimorphism. Males have iridescent dark green head; rich chestnut underparts with white flank patch. Brown back; dark undertail. Females mottled brown with pale face. Iridescent green speculum. Australian coastal.
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
Chestnut Teal
チェスナットティールはオーストラリア南東部に固有のカモです。雄は栗色（チェスナット色）の体に緑色の頭部が鮮やかです。沿岸の汽水湿地、潮間帯、河口に生息し、無脊椎動物、種子、水草を採食します。オーストラリア最南端まで分布する唯一のカモです。
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.