Arctic Tern vs European Robin
Sterna paradisaea 比較対象 Erithacus rubecula
Side-by-Side Comparison
| 属性 | Arctic Tern | European Robin |
|---|---|---|
| 学名 | Sterna paradisaea | Erithacus rubecula |
| 目 | Charadriiformes | Passeriformes |
| 科 | Laridae | Muscicapidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 34.0 cm (13.4 in) | 14.0 cm (5.5 in) |
| 翼開長 | 80.0 cm (31.5 in) | 21.0 cm (8.3 in) |
| 体重 | 110.0 g (3.88 oz) | 18.0 g (0.63 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Insects, worms, and berries. Often follows gardeners and large animals to catch invertebrates disturbed from … |
| 一腹卵数 | 2-3 | 4-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Arctic Tern
Breeds on coastal and tundra habitats. Spends most of its life at sea over the open ocean. Nests in colonies on beaches and rocky shores.
European Robin
Woodlands, hedgerows, parks, and gardens across Europe. Remarkably tame around humans, especially in Britain.
Song & Call Comparison
Arctic Tern
A sharp, grating 'kree-yah' alarm call. Also gives 'kik-kik-kik' near the nest. Highly aggressive vocally during the Arctic breeding season. Calls are harsh and insistent.
European Robin
Exquisite, melancholic melody of thin whistled phrases, rising and falling softly. Rich, warbling song year-round; both sexes sing. Alarm call is a sharp 'tic-tic-tic'.
Geographic Range & Migration
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
European Robin
Europe, western Asia, and parts of North Africa. Northern populations migrate south in winter; western European populations are largely resident.
保全状況
Arctic Tern
European Robin
How to Tell Them Apart
Arctic Tern
Pale grey upperparts, white underparts with a black cap. Blood-red bill and short red legs. Deeply forked tail streamers. Winter adults lose the full black cap.
Slender, pointed, bright red bill
European Robin
Olive-brown upperparts with a warm orange-red breast and face bordered by grey. White belly and undertail coverts.
Thin, pointed dark brown bill
About These Birds
Arctic Tern
キョクアジサシはあらゆる動物の中で最長の渡りを行い、毎年北極と南極を往復する約7万kmの旅をする。30年の寿命の中に、月への往復3回分に相当する飛翔距離を積み重ねる可能性がある。地球上でどの生物よりも多くの昼光を経験するこの驚異的な鳥は、太陽を追い続ける。
European Robin
イギリスの非公式の国鳥で、縄張り意識が強く、一年中さえずる。民話では鳥の中の特別な地位を持つ。