Atlantic White Tern vs River Tern
Gygis alba 对比 Sterna aurantia
Side-by-Side Comparison
| 属性 | Atlantic White Tern | River Tern |
|---|---|---|
| 学名 | Gygis alba | Sterna aurantia |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Vulnerable |
| 体长 | — | — |
| 翼展 | 50.4 cm (19.8 in) | 52.4 cm (20.6 in) |
| 体重 | 138.0 g (4.87 oz) | 187.5 g (6.61 oz) |
| 食性 | -- | -- |
| 产卵数 | 1 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Atlantic White Tern
Vulnerable
River Tern
About These Birds
Atlantic White Tern
白燕鸥是分布于热带海洋的优美鸟类，全身纯白，眼大而深色，喙细长。独特之处在于直接将单枚卵产在裸露的树枝或岩石上，不筑巢。广泛分布于太平洋和印度洋的热带岛屿，以小型鱼类和甲壳类为食，飞行优雅灵活。
River Tern
River Tern, 38–43 cm, is a large freshwater tern of South and Southeast Asia, found along major rivers from Pakistan to Thailand. Yellow-orange bill, grey back, black cap in breeding plumage. Piscivore; plunge-dives into clear river water. Near Threatened due to river sand-mining and disturbance.