Aleutian Tern vs Black-legged Kittiwake
Onychoprion aleuticus 比較対象 Rissa tridactyla
Side-by-Side Comparison
| 属性 | Aleutian Tern | Black-legged Kittiwake |
|---|---|---|
| 学名 | Onychoprion aleuticus | Rissa tridactyla |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Vulnerable | Vulnerable |
| 体長 | — | — |
| 翼開長 | 52.4 cm (20.6 in) | 60.2 cm (23.7 in) |
| 体重 | 104.88 g (3.70 oz) | 439.3333333333333 g (15.50 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Vulnerable
Aleutian Tern
Vulnerable
Black-legged Kittiwake
About These Birds
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.
Black-legged Kittiwake
北大西洋・北太平洋の断崖で繁殖し、外洋で越冬する海鳥（体長38〜40cm）。白い体と灰色の翼・黒い翼端、後趾の退化が特徴的。Rissa tridactyla（ミツユビカモメ）は垂直な岩の壁面に小さな巣を作るが、子供は落下防止のために本能的に動かない行動を取る。Laridae科。