Grey Noddy vs Arctic Tern
Anous albivittus 对比 Sterna paradisaea
Side-by-Side Comparison
| 属性 | Grey Noddy | Arctic Tern |
|---|---|---|
| 学名 | Anous albivittus | Sterna paradisaea |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | 34.0 cm (13.4 in) |
| 翼展 | 40.4 cm (15.9 in) | 80.0 cm (31.5 in) |
| 体重 | 67.0 g (2.36 oz) | 110.0 g (3.88 oz) |
| 食性 | -- | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. |
| 产卵数 | 1 | 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
Grey Noddy
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.
Geographic Range & Migration
Grey Noddy
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
保护状况
Grey Noddy
Arctic Tern
How to Tell Them Apart
Grey Noddy
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
About These Birds
Grey Noddy
Grey Noddy is a small tern-like seabird, 28–32 cm, found across the central and western Pacific on tropical oceanic islands. Pale grey overall with a white crown; nests colonially on ledges. Piscivore, plunge-dives for small fish near reef flats. Pelagic when not breeding.
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。