Black-tailed Gull vs Bonaparte's Gull
Larus crassirostris so với Larus philadelphia
Side-by-Side Comparison
| Thuộc Tính | Black-tailed Gull | Bonaparte's Gull |
|---|---|---|
| Tên Khoa Học | Larus crassirostris | Larus philadelphia |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 72,8 cm (28.7 in) | 51,9 cm (20.4 in) |
| Khối Lượng | 675,0 g (23.81 oz) | 204,575 g (7.22 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2-3 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Black-tailed Gull only
Không
Bonaparte's Gull only
Tình Trạng Bảo Tồn
Least Concern
Black-tailed Gull
Least Concern
Bonaparte's 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.
Bonaparte's Gull
Bonaparte's Gull, 28–30 cm, is North America's smallest Larus gull, breeding in boreal forests near lakes and wintering on both coasts. Breeding adult has a black hood; underwing shows white triangular flash. Planktivore and piscivore; buoyant, tern-like flight. Migratory; forms large winter flocks.