Black-tailed Gull vs Snowy-crowned Tern
Larus crassirostris مقارنةً بـ Sterna trudeaui
Side-by-Side Comparison
| السمة | Black-tailed Gull | Snowy-crowned Tern |
|---|---|---|
| الاسم العلمي | Larus crassirostris | Sterna trudeaui |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 72,8 cm (28.7 in) | 51,2 cm (20.2 in) |
| الوزن | 675,0 g (23.81 oz) | 149,75 g (5.28 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 2-3 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Least Concern
Black-tailed Gull
Least Concern
Snowy-crowned 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.
Snowy-crowned Tern
Snowy-crowned Tern, 33–35 cm, breeds along the Atlantic coasts of Argentina and Uruguay, wintering north to southern Brazil. White crown with black post-ocular mark (unlike a full black cap), yellow-tipped red bill. Coastal and estuarine piscivore; plunge-dives for small fish.