Saunders's Gull vs River Tern
Saundersilarus saundersi 对比 Sterna aurantia
Side-by-Side Comparison
| 属性 | Saunders's Gull | River Tern |
|---|---|---|
| 学名 | Saundersilarus saundersi | Sterna aurantia |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Vulnerable |
| 体长 | — | — |
| 翼展 | 54.8 cm (21.6 in) | 52.4 cm (20.6 in) |
| 体重 | 195.0 g (6.88 oz) | 187.5 g (6.61 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-6 | 3-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Saunders's Gull
Vulnerable
River Tern
About These Birds
Saunders's Gull
Saunders's Gull, 29–32 cm, is a Vulnerable gull breeding in coastal saltmarshes of China and Korea, wintering along East Asian coasts to Vietnam. Black hood in breeding plumage, white wing-tip mirrors. Feeds on crustaceans and invertebrates in tidal mudflats. Threatened by reclamation of Yellow Sea tidal flats.
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.