Black-tailed Gull vs River Tern
Larus crassirostris से तुलना Sterna aurantia
Side-by-Side Comparison
| विशेषता | Black-tailed Gull | River Tern |
|---|---|---|
| वैज्ञानिक नाम | Larus crassirostris | Sterna aurantia |
| गण | Charadriiformes | Charadriiformes |
| कुल | Laridae | Laridae |
| संरक्षण स्थिति | Least Concern | Vulnerable |
| लंबाई | — | — |
| पंखों का फैलाव | 72.8 cm (28.7 in) | 52.4 cm (20.6 in) |
| वजन | 675.0 g (23.81 oz) | 187.5 g (6.61 oz) |
| आहार | -- | -- |
| अंडों की संख्या | 2-3 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
संरक्षण स्थिति
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.