Atlantic White Tern vs Short-billed Gull
Gygis alba 比較対象 Larus brachyrhynchus
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Short-billed Gull |
|---|---|---|
| 学名 | Gygis alba | Larus brachyrhynchus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Not Evaluated |
| 体長 | — | — |
| 翼開長 | 50.4 cm (19.8 in) | — |
| 体重 | 138.0 g (4.87 oz) | 395.0 g (13.93 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1 | 1-5 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Atlantic White Tern
Not Evaluated
Short-billed Gull
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。
Short-billed Gull
Short-billed Gull, 40–45 cm, breeds in interior Alaska and western Canada, wintering on the Pacific coast. Recently split from Common Gull; slightly smaller with a shorter bill and more rounded head. Omnivore; often inland on grasslands and agricultural fields during migration. Migratory.