Aleutian Tern vs Saunders's Gull
Onychoprion aleuticus 比較対象 Saundersilarus saundersi
Side-by-Side Comparison
| 属性 | Aleutian Tern | Saunders's Gull |
|---|---|---|
| 学名 | Onychoprion aleuticus | Saundersilarus saundersi |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Vulnerable | Vulnerable |
| 体長 | — | — |
| 翼開長 | 52.4 cm (20.6 in) | 54.8 cm (21.6 in) |
| 体重 | 104.88 g (3.70 oz) | 195.0 g (6.88 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-4 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Vulnerable
Aleutian Tern
Vulnerable
Saunders's Gull
About These Birds
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.
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.