Black-tailed Gull vs Western Gull
Larus crassirostris เปรียบเทียบกับ Larus occidentalis
Side-by-Side Comparison
| คุณสมบัติ | Black-tailed Gull | Western Gull |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus crassirostris | Larus occidentalis |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 72.8 cm (28.7 in) | 79.5 cm (31.3 in) |
| น้ำหนัก | 675.0 g (23.81 oz) | 957.5 g (33.77 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2-3 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Black-tailed Gull
Least Concern
Western Gull
About These Birds
Black-tailed Gull
Black-tailed Gull, 44–48 cm, is common on East Asian coasts from Russia to China, Japan, and Korea. Grey mantle, white body, yellow bill with red spot and black subterminal band, yellow legs. Omnivore; very vocal, known as the 'cat gull' for its mewing calls. Migratory; winters south to Vietnam.
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.