Aleutian Tern vs Black-legged Kittiwake
Onychoprion aleuticus 对比 Rissa tridactyla
Side-by-Side Comparison
| 属性 | Aleutian Tern | Black-legged Kittiwake |
|---|---|---|
| 学名 | Onychoprion aleuticus | Rissa tridactyla |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Vulnerable |
| 体长 | — | — |
| 翼展 | 52.4 cm (20.6 in) | 60.2 cm (23.7 in) |
| 体重 | 104.88 g (3.70 oz) | 439.3333333333333 g (15.50 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Aleutian Tern
Vulnerable
Black-legged Kittiwake
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.
Black-legged Kittiwake
三趾鸥（约400克）是一种典型的海洋性鸥类，在陡峭悬崖上筑巢，在大洋上度过非繁殖季节。翅尖纯黑，后趾退化（由此得名）。以鱼类和浮游动物为食。易危；近几十年来某些种群数量大幅下降，可能与鱼类减少和气候变化有关。