Black-tailed Gull vs River Tern
Larus crassirostris 对比 Sterna aurantia
Side-by-Side Comparison
| 属性 | Black-tailed Gull | River Tern |
|---|---|---|
| 学名 | Larus crassirostris | Sterna aurantia |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Vulnerable |
| 体长 | — | — |
| 翼展 | 72.8 cm (28.7 in) | 52.4 cm (20.6 in) |
| 体重 | 675.0 g (23.81 oz) | 187.5 g (6.61 oz) |
| 食性 | -- | -- |
| 产卵数 | 2-3 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Black-tailed Gull
Vulnerable
River Tern
About These Birds
Black-tailed Gull
黑尾鸥以日本为中心分布于东亚沿岸，以猫叫声为特征的大型鸥类。
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.