Black-tailed Gull vs Red-legged Kittiwake
Larus crassirostris so với Rissa brevirostris
Side-by-Side Comparison
| Thuộc Tính | Black-tailed Gull | Red-legged Kittiwake |
|---|---|---|
| Tên Khoa Học | Larus crassirostris | Rissa brevirostris |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 72,8 cm (28.7 in) | 60,0 cm (23.6 in) |
| Khối Lượng | 675,0 g (23.81 oz) | 401,6666666666667 g (14.17 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2-3 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Black-tailed Gull
Vulnerable
Red-legged Kittiwake
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.
Red-legged Kittiwake
Red-legged Kittiwake, 35–39 cm, has a very restricted range on only four Aleutian and Pribilof Island colonies, with a world population under 200,000. Resembles Black-legged Kittiwake but with bright red legs, darker upperparts, and white underwing tips. Pelagic piscivore; Vulnerable and declining.