Atlantic White Tern vs Black-naped Tern
Gygis alba 对比 Sterna sumatrana
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Black-naped Tern |
|---|---|---|
| 学名 | Gygis alba | Sterna sumatrana |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 50.4 cm (19.8 in) | 43.1 cm (17.0 in) |
| 体重 | 138.0 g (4.87 oz) | 103.75 g (3.66 oz) |
| 食性 | -- | -- |
| 产卵数 | 1 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Atlantic White Tern
Least Concern
Black-naped 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。
Black-naped Tern
Black-naped Tern, 30–32 cm, breeds on tropical Indo-Pacific coral islands from the Maldives to Polynesia. White overall with a narrow black nape band connecting the black lores — a delicate, elegant pattern. Piscivore; surface-dips and shallow dives in clear tropical waters over reefs.