Arctic Tern vs Common Tern
Sterna paradisaea 对比 Sterna hirundo
Side-by-Side Comparison
| 属性 | Arctic Tern | Common Tern |
|---|---|---|
| 学名 | Sterna paradisaea | Sterna hirundo |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 34.0 cm (13.4 in) | — |
| 翼展 | 80.0 cm (31.5 in) | 50.7 cm (20.0 in) |
| 体重 | 110.0 g (3.88 oz) | 125.75 g (4.44 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| 产卵数 | 2-3 | 2-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Arctic Tern
Breeds on coastal and tundra habitats. Spends most of its life at sea over the open ocean. Nests in colonies on beaches and rocky shores.
Song & Call Comparison
Arctic Tern
A sharp, grating 'kree-yah' alarm call. Also gives 'kik-kik-kik' near the nest. Highly aggressive vocally during the Arctic breeding season. Calls are harsh and insistent.
Common Tern
Geographic Range & Migration
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
Common Tern
保护状况
Arctic Tern
Common Tern
How to Tell Them Apart
Arctic Tern
Pale grey upperparts, white underparts with a black cap. Blood-red bill and short red legs. Deeply forked tail streamers. Winter adults lose the full black cap.
Slender, pointed, bright red bill
Common Tern
About These Birds
Arctic Tern
北极燕鸥进行所有动物中最长的迁徙，每年从北极繁殖地飞往南极越冬地，往返距离超过70,000公里。体型纤细，翼展约80厘米，全身主要为白色，具黑色头冠和红色喙。无危；繁殖于北极和亚北极海岸及岛屿，全球种群约200万只。
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。