Black-billed Gull vs Black-tailed Gull
Larus bulleri مقارنةً بـ Larus crassirostris
Side-by-Side Comparison
| السمة | Black-billed Gull | Black-tailed Gull |
|---|---|---|
| الاسم العلمي | Larus bulleri | Larus crassirostris |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Near Threatened | Least Concern |
| الطول | — | — |
| طول الجناح | 57,5 cm (22.6 in) | 72,8 cm (28.7 in) |
| الوزن | 216,83333333333334 g (7.65 oz) | 675,0 g (23.81 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1-3 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Near Threatened
Black-billed Gull
Least Concern
Black-tailed Gull
About These Birds
Black-billed Gull
Black-billed Gull, 35–38 cm, is endemic to New Zealand, breeding on South Island braided riverbeds. All-white plumage with a slender black bill and black-tipped wings. Endangered; river modification and mammal predation depress breeding success. Insectivore and piscivore in river and coastal habitats.
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.