Common Gull-billed Tern vs Aleutian Tern
Gelochelidon nilotica 比較対象 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Common Gull-billed Tern | Aleutian Tern |
|---|---|---|
| 学名 | Gelochelidon nilotica | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 61.6 cm (24.3 in) | 52.4 cm (20.6 in) |
| 体重 | 214.075 g (7.55 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Common Gull-billed Tern
Vulnerable
Aleutian Tern
About These Birds
Common Gull-billed Tern
世界中の温帯から熱帯の海岸・塩性湿地・内陸湿地で繁殖するアジサシ（体長35〜43cm）。白い体と黒い帽子が特徴で、他のアジサシとは異なり魚より昆虫を多く食べる。Gelochelidon nilotica（ハシブトアジサシ）は水に潜らず地面で採食し、カエルや大型昆虫も好む。Laridae科。
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.