Black-tailed Gull vs Forster's Tern
Larus crassirostris 对比 Sterna forsteri
Side-by-Side Comparison
| 属性 | Black-tailed Gull | Forster's Tern |
|---|---|---|
| 学名 | Larus crassirostris | Sterna forsteri |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 72.8 cm (28.7 in) | 50.5 cm (19.9 in) |
| 体重 | 675.0 g (23.81 oz) | 151.25 g (5.34 oz) |
| 食性 | -- | -- |
| 产卵数 | 2-3 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Black-tailed Gull
Least Concern
Forster's 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。
Forster's Tern
Forster's Tern, 33–36 cm, breeds in interior North American marshes and winters along both US coasts and into Mexico. Distinctive frosted silver upperparts and orange-based bill. In non-breeding plumage, shows a black eye-mask. Piscivore; hovers and plunge-dives in coastal bays and lagoons.