Black-tailed Gull vs Ring-billed Gull
Larus crassirostris so với Larus delawarensis
Side-by-Side Comparison
| Thuộc Tính | Black-tailed Gull | Ring-billed Gull |
|---|---|---|
| Tên Khoa Học | Larus crassirostris | Larus delawarensis |
| 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) | 73,2 cm (28.8 in) |
| Khối Lượng | 675,0 g (23.81 oz) | 500,0 g (17.64 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2-3 | 3 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
Least Concern
Black-tailed Gull
Least Concern
Ring-billed 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.
Ring-billed Gull
Ring-billed Gull, 43–54 cm, is North America's most abundant gull, breeding on lakes from the Great Plains to the Great Lakes and wintering on all coasts. Adult has a distinctive black ring near bill tip, yellow legs. Omnivore; thrives on garbage, parking lots, and agricultural fields.