Tundra Swan vs Blue-billed Teal
Cygnus columbianus 对比 Spatula hottentota
Side-by-Side Comparison
| 属性 | Tundra Swan | Blue-billed Teal |
|---|---|---|
| 学名 | Cygnus columbianus | Spatula hottentota |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 107.6 cm (42.4 in) | 29.4 cm (11.6 in) |
| 体重 | 6675.0 g (235.45 oz) | 269.2 g (9.50 oz) |
| 食性 | Eats seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; diet becomes more invertebrate-heavy in … | Feeds on seeds, aquatic plants, and invertebrates; filter-feeds in shallow water; broadly omnivorous and seasonally … |
| 产卵数 | 3-6 | 5-12 |
| Population Trend | — | — |
Habitat Comparison
Tundra Swan
Breeds on Arctic tundra ponds and lakes in Alaska, Canada, and Siberia. Winters on coastal estuaries, shallow bays, agricultural fields, and freshwater lakes in North America, Europe, and eastern Asia.
Blue-billed Teal
Freshwater lakes, marshes, pans, and flooded grasslands across sub-Saharan Africa from Senegal and Sudan south to the Cape. Nomadic; follows seasonal rains. Common but easily overlooked among reed beds.
Song & Call Comparison
Tundra Swan
A high, bugling 'who-who-who' with a musical quality. North American subspecies (Whistling Swan) produces a higher-pitched call than European Bewick's Swan (Cygnus c. bewickii).
Blue-billed Teal
Male utters a soft, teal-like peep; female gives a muted quack. Pairs call quietly in dense papyrus; soft contact calls help birds maintain proximity in thick African marsh vegetation.
Geographic Range & Migration
Tundra Swan
Breeds in the northern Great Plains; winters along the Gulf Coast from Texas to Florida. Uses the Central and Mississippi flyways.
Blue-billed Teal
Breeds in Arctic and subarctic Eurasia; winters at sea in the North Atlantic and from western Europe to eastern Africa.
保护状况
Tundra Swan
Blue-billed Teal
How to Tell Them Apart
Tundra Swan
All-white plumage; bill black with small yellow patch at base near eye. Neck shorter and rounder-headed than Trumpeter Swan. Juveniles grayish-brown. Bewick's race has more extensive yellow on bill.
Blue-billed Teal
Small; males have pale blue-gray bill contrasting with brown-gray body. Head finely spotted; underparts barred brown and white. Males show powder-blue forewing in flight. Females browner. African marsh species.
About These Birds
Tundra Swan
A medium-sized white swan with a black bill often marked with a small yellow spot at the base. Migrates in large flocks between Arctic tundra breeding grounds and temperate wintering areas. Two subspecies: Bewick's Swan in the Old World and Whistling Swan in the New World.
Blue-billed Teal
霍屯都鸭是非洲的一种小型水面鸭，以南非土著霍屯都人命名，主要分布于撒哈拉以南非洲东部和南部。体型小，雄鸟头颈部蓝灰色，体羽棕褐色有细纹；雌鸟褐色。栖息于淡水湖泊、沼泽和湿地，以水生植物和无脊椎动物为食。