Aleutian Tern vs Bridled Tern
Onychoprion aleuticus 比較対象 Onychoprion anaethetus
Side-by-Side Comparison
| 属性 | Aleutian Tern | Bridled Tern |
|---|---|---|
| 学名 | Onychoprion aleuticus | Onychoprion anaethetus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 52.4 cm (20.6 in) | 54.7 cm (21.5 in) |
| 体重 | 104.88 g (3.70 oz) | 129.13333333333333 g (4.56 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-4 | 1 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Vulnerable
Aleutian Tern
Least Concern
Bridled 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.
Bridled Tern
Bridled Tern, 30–32 cm, breeds on tropical islands across the Indo-Pacific and Atlantic. Dark brownish-black above with a white forehead stripe extending behind the eye — the diagnostic 'bridle'. Pelagic outside breeding; piscivore, takes fish and squid at the surface.