Aleutian Tern vs Elegant Tern
Onychoprion aleuticus 对比 Thalasseus elegans
Side-by-Side Comparison
| 属性 | Aleutian Tern | Elegant Tern |
|---|---|---|
| 学名 | Onychoprion aleuticus | Thalasseus elegans |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Near Threatened |
| 体长 | — | — |
| 翼展 | 52.4 cm (20.6 in) | 59.3 cm (23.3 in) |
| 体重 | 104.88 g (3.70 oz) | 236.16666666666666 g (8.33 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Aleutian Tern
Near Threatened
Elegant 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.
Elegant Tern
Elegant Tern, 39–43 cm, breeds in a few large colonies on islands off Baja California and winters along Pacific coasts of South America. Long, drooping orange bill, shaggy black crest. Piscivore; dependent on Northern Anchovy and Pacific Sardine. Near Threatened; highly colonial breeder.