Atlantic White Tern vs Red-legged Kittiwake
Gygis alba 比較対象 Rissa brevirostris
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Red-legged Kittiwake |
|---|---|---|
| 学名 | Gygis alba | Rissa brevirostris |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 50.4 cm (19.8 in) | 60.0 cm (23.6 in) |
| 体重 | 138.0 g (4.87 oz) | 401.6666666666667 g (14.17 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Atlantic White Tern
Vulnerable
Red-legged Kittiwake
About These Birds
Atlantic White Tern
シロアジサシは体長28〜33 cm、翼幅76〜87 cm、霊妙な白色の海鳥で青灰色のくちばし・青みがかった眼輪・大きな暗色の瞳を持つ。大西洋の熱帯の島（アセンション島・セントヘレナ島など）に繁殖し、近縁種はインド・太平洋に広く分布。巣材なしで裸の枝に産卵。水面近くで小魚を捕食。
Red-legged Kittiwake
Red-legged Kittiwake, 35–39 cm, has a very restricted range on only four Aleutian and Pribilof Island colonies, with a world population under 200,000. Resembles Black-legged Kittiwake but with bright red legs, darker upperparts, and white underwing tips. Pelagic piscivore; Vulnerable and declining.