Black-tailed Gull vs Ivory Gull
Larus crassirostris مقارنةً بـ Pagophila eburnea
Side-by-Side Comparison
| السمة | Black-tailed Gull | Ivory Gull |
|---|---|---|
| الاسم العلمي | Larus crassirostris | Pagophila eburnea |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Least Concern | Near Threatened |
| الطول | — | — |
| طول الجناح | 72,8 cm (28.7 in) | 66,7 cm (26.3 in) |
| الوزن | 675,0 g (23.81 oz) | 578,3333333333334 g (20.40 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 2-3 | 2 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Least Concern
Black-tailed Gull
Near Threatened
Ivory 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.
Ivory Gull
Ivory Gull, 40–43 cm, is entirely white with black legs, breeding only on High Arctic ice caps and cliffs in Canada, Greenland, Svalbard, and Russia. Winters at sea ice edges in the High Arctic. Scavenges on marine mammal carcasses and sea ice invertebrates. Near Threatened; climate-sensitive.