Saunders's Gull vs Black-naped Tern
Saundersilarus saundersi 对比 Sterna sumatrana
Side-by-Side Comparison
| 属性 | Saunders's Gull | Black-naped Tern |
|---|---|---|
| 学名 | Saundersilarus saundersi | Sterna sumatrana |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 54.8 cm (21.6 in) | 43.1 cm (17.0 in) |
| 体重 | 195.0 g (6.88 oz) | 103.75 g (3.66 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-6 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Saunders's Gull
Least Concern
Black-naped 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.
Black-naped Tern
Black-naped Tern, 30–32 cm, breeds on tropical Indo-Pacific coral islands from the Maldives to Polynesia. White overall with a narrow black nape band connecting the black lores — a delicate, elegant pattern. Piscivore; surface-dips and shallow dives in clear tropical waters over reefs.