Black-tailed Gull vs Western Gull
Larus crassirostris 对比 Larus occidentalis
Side-by-Side Comparison
| 属性 | Black-tailed Gull | Western Gull |
|---|---|---|
| 学名 | Larus crassirostris | Larus occidentalis |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 72.8 cm (28.7 in) | 79.5 cm (31.3 in) |
| 体重 | 675.0 g (23.81 oz) | 957.5 g (33.77 oz) |
| 食性 | -- | -- |
| 产卵数 | 2-3 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Black-tailed Gull
Least Concern
Western Gull
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。
Western Gull
Western Gull, 55–68 cm, is the dominant large gull on the US Pacific coast from Washington to Baja California. Dark-mantled with pink legs, yellow bill with red spot. Omnivore; breeds on offshore islands, scavenges at harbours and landfills. Non-migratory; resident along its breeding coast.