Atlantic White Tern vs Damara Tern
Gygis alba 对比 Sternula balaenarum
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Damara Tern |
|---|---|---|
| 学名 | Gygis alba | Sternula balaenarum |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 50.4 cm (19.8 in) | 33.9 cm (13.3 in) |
| 体重 | 138.0 g (4.87 oz) | 50.675 g (1.79 oz) |
| 食性 | -- | -- |
| 产卵数 | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Atlantic White Tern
Least Concern
Damara 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。
Damara Tern
Damara Tern, 22–24 cm, is a Vulnerable tern endemic to the Namibian and South African coast. White below, grey above, with a black cap and yellow bill. Breeds sparsely on Namibian beaches; winters north to Gulf of Guinea. Highly sensitive to coastal development and off-road vehicles.