Aleutian Tern vs Common Tern
Onychoprion aleuticus 对比 Sterna hirundo
Side-by-Side Comparison
| 属性 | Aleutian Tern | Common Tern |
|---|---|---|
| 学名 | Onychoprion aleuticus | Sterna hirundo |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 52.4 cm (20.6 in) | 50.7 cm (20.0 in) |
| 体重 | 104.88 g (3.70 oz) | 125.75 g (4.44 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-4 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Aleutian Tern
Least Concern
Common 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.
Common Tern
普通燕鸥（约130克）是世界上最广布的燕鸥，繁殖于欧洲、北美和亚洲，越冬于南部沿海地区。具有红色喙（黑色尖端）和深叉形尾羽，以扎入水中的方式捕鱼。无危；种群数量庞大，受益于人工浮台等保护措施。