Aleutian Tern vs Yellow-billed Tern
Onychoprion aleuticus 比較対象 Sternula superciliaris
Side-by-Side Comparison
| 属性 | Aleutian Tern | Yellow-billed Tern |
|---|---|---|
| 学名 | Onychoprion aleuticus | Sternula superciliaris |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 52.4 cm (20.6 in) | 33.8 cm (13.3 in) |
| 体重 | 104.88 g (3.70 oz) | 47.800000000000004 g (1.69 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-4 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Vulnerable
Aleutian Tern
Least Concern
Yellow-billed Tern
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.
Yellow-billed Tern
Yellow-billed Tern, 22–24 cm, is a freshwater tern of the Amazon and Orinoco river systems in South America. Yellow bill and legs, grey back, black cap. Piscivore; hovers over rivers and lakes, diving for small fish. Resident year-round along major tropical waterways.