Atlantic White Tern vs Black Skimmer
Gygis alba 对比 Rynchops niger
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Black Skimmer |
|---|---|---|
| 学名 | Gygis alba | Rynchops niger |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 50.4 cm (19.8 in) | 73.1 cm (28.8 in) |
| 体重 | 138.0 g (4.87 oz) | 293.6666666666667 g (10.36 oz) |
| 食性 | -- | -- |
| 产卵数 | 1 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Atlantic White Tern
Least Concern
Black Skimmer
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 Skimmer
Black Skimmer: 40–50 cm, the largest skimmer with jet black upperparts, white underparts, and an outsized red-and-black bill with protruding lower mandible. Inhabits large rivers, estuaries, and coastal lagoons of North and South America. Feeds at dawn and dusk by skimming water surface. Nests colonially on sandy beaches. Partly migratory.