Black-tailed Gull vs River Tern
Larus crassirostris в сравнении с Sterna aurantia
Side-by-Side Comparison
| Характеристика | Black-tailed Gull | River Tern |
|---|---|---|
| Научное название | Larus crassirostris | Sterna aurantia |
| Отряд | Charadriiformes | Charadriiformes |
| Семейство | Laridae | Laridae |
| Охранный статус | Least Concern | Vulnerable |
| Длина | — | — |
| Размах крыльев | 72,8 cm (28.7 in) | 52,4 cm (20.6 in) |
| Масса | 675,0 g (23.81 oz) | 187,5 g (6.61 oz) |
| Питание | -- | -- |
| Размер кладки | 2-3 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
Охранный статус
Least Concern
Black-tailed Gull
Vulnerable
River 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.
River Tern
River Tern, 38–43 cm, is a large freshwater tern of South and Southeast Asia, found along major rivers from Pakistan to Thailand. Yellow-orange bill, grey back, black cap in breeding plumage. Piscivore; plunge-dives into clear river water. Near Threatened due to river sand-mining and disturbance.