Swallow-tailed Gull vs Aleutian Tern
Creagrus furcatus 比較対象 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Swallow-tailed Gull | Aleutian Tern |
|---|---|---|
| 学名 | Creagrus furcatus | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 81.8 cm (32.2 in) | 52.4 cm (20.6 in) |
| 体重 | 695.0 g (24.52 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Swallow-tailed Gull
Vulnerable
Aleutian Tern
About These Birds
Swallow-tailed Gull
ツバメオキワメ（Creagrus furcatus）— ガラパゴス諸島で繁殖する世界唯一の完全な夜行性カモメ。燕尾状の尾と赤い眼輪が特徴。沖合で採食する。
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.