Black-tailed Gull vs Roseate Tern
Larus crassirostris مقارنةً بـ Sterna dougallii
Side-by-Side Comparison
| السمة | Black-tailed Gull | Roseate Tern |
|---|---|---|
| الاسم العلمي | Larus crassirostris | Sterna dougallii |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 72,8 cm (28.7 in) | 44,8 cm (17.6 in) |
| الوزن | 675,0 g (23.81 oz) | 114,33333333333333 g (4.03 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 2-3 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Least Concern
Black-tailed Gull
Least Concern
Roseate Tern
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.
Roseate Tern
Roseate Tern, 33–36 cm, is a globally distributed but declining species, breeding on both sides of the Atlantic, Indian Ocean, and Pacific. Nearly white with a rosy flush to breast in spring, very long tail streamers, and mostly black bill. Plunge-dives for small fish. Endangered in parts of range.