Black-tailed Gull vs Slaty-backed Gull
Larus crassirostris เปรียบเทียบกับ Larus schistisagus
Side-by-Side Comparison
| คุณสมบัติ | Black-tailed Gull | Slaty-backed Gull |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Larus crassirostris | Larus schistisagus |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Laridae | Laridae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 72.8 cm (28.7 in) | 87.0 cm (34.3 in) |
| น้ำหนัก | 675.0 g (23.81 oz) | 1280.5 g (45.17 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Black-tailed Gull
Least Concern
Slaty-backed 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.
Slaty-backed Gull
Slaty-backed Gull, 55–68 cm, breeds on coasts and cliffs of the Russian Far East, wintering south to Japan and occasionally the US Pacific coast. Dark slate-grey mantle, pink legs, 'string of pearls' white mirrors on outer wing. Omnivore; scavenges at fishing ports in East Asian harbours.