Black-tailed Gull vs Bonaparte's Gull
Larus crassirostris مقارنةً بـ Larus philadelphia
Side-by-Side Comparison
| السمة | Black-tailed Gull | Bonaparte's Gull |
|---|---|---|
| الاسم العلمي | Larus crassirostris | Larus philadelphia |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 72,8 cm (28.7 in) | 51,9 cm (20.4 in) |
| الوزن | 675,0 g (23.81 oz) | 204,575 g (7.22 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 2-3 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
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.