Aleutian Tern vs Least Tern
Onychoprion aleuticus 比較対象 Sternula antillarum
Side-by-Side Comparison
| 属性 | Aleutian Tern | Least Tern |
|---|---|---|
| 学名 | Onychoprion aleuticus | Sternula antillarum |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 52.4 cm (20.6 in) | 33.0 cm (13.0 in) |
| 体重 | 104.88 g (3.70 oz) | 46.75 g (1.65 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Vulnerable
Aleutian Tern
Least Concern
Least 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.
Least Tern
Least Tern is North America's smallest tern, 22–24 cm, breeding on sandy beaches and river sandbars from the Atlantic coast to the interior. Endangered (interior subspecies). Yellow bill, white forehead, grey upperparts. Hovers and plunge-dives for small fish in coastal and riverine habitats.