Black-tailed Gull vs Grey-backed Tern
Larus crassirostris مقارنةً بـ Onychoprion lunatus
Side-by-Side Comparison
| السمة | Black-tailed Gull | Grey-backed Tern |
|---|---|---|
| الاسم العلمي | Larus crassirostris | Onychoprion lunatus |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 72,8 cm (28.7 in) | 52,2 cm (20.6 in) |
| الوزن | 675,0 g (23.81 oz) | 126,21666666666665 g (4.45 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 2-3 | 1 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Least Concern
Black-tailed Gull
Least Concern
Grey-backed 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.
Grey-backed Tern
Grey-backed Tern, 35–37 cm, is a Pacific seabird breeding on islands from Hawaii to Micronesia and Polynesia. Pale grey back distinguishes it from the similar Bridled Tern; white below with black cap. Piscivore; surface-dips and shallow plunge-dives. Largely pelagic when not breeding.