Atlantic White Tern vs Black Skimmer
Gygis alba 比較対象 Rynchops niger
Side-by-Side Comparison
| 属性 | Atlantic White Tern | Black Skimmer |
|---|---|---|
| 学名 | Gygis alba | Rynchops niger |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 50.4 cm (19.8 in) | 73.1 cm (28.8 in) |
| 体重 | 138.0 g (4.87 oz) | 293.6666666666667 g (10.36 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1 | 1-6 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Atlantic White Tern
Least Concern
Black Skimmer
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。
Black Skimmer
Black Skimmer: 40–50 cm, the largest skimmer with jet black upperparts, white underparts, and an outsized red-and-black bill with protruding lower mandible. Inhabits large rivers, estuaries, and coastal lagoons of North and South America. Feeds at dawn and dusk by skimming water surface. Nests colonially on sandy beaches. Partly migratory.