Arctic Tern vs Eurasian Magpie
Sterna paradisaea 比較対象 Pica pica
Side-by-Side Comparison
| 属性 | Arctic Tern | Eurasian Magpie |
|---|---|---|
| 学名 | Sterna paradisaea | Pica pica |
| 目 | Charadriiformes | Passeriformes |
| 科 | Laridae | Corvidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 34.0 cm (13.4 in) | 46.0 cm (18.1 in) |
| 翼開長 | 80.0 cm (31.5 in) | 56.0 cm (22.0 in) |
| 体重 | 110.0 g (3.88 oz) | 220.0 g (7.76 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Omnivorous — insects, grains, berries, carrion, eggs, and nestlings. Caches surplus food for later retrieval. |
| 一腹卵数 | 2-3 | 2-8 |
| 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.
Eurasian Magpie
Open woodland, farmland, hedgerows, parks, and gardens. Common in suburban and urban environments across Eurasia.
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.
Eurasian Magpie
A harsh, rapid chattering 'chach-chach-chach'. Also gives a variety of whistles and clucking notes. Known to mimic other birds and sounds. Very vocal in pairs.
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.
Eurasian Magpie
Europe, Asia, and northwest Africa. One of the most recognizable birds across the Palearctic region.
保全状況
Arctic Tern
Eurasian Magpie
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
Eurasian Magpie
Bold black and white pattern with iridescent blue-green gloss on the wings and long graduated tail. White scapulars and flanks contrast with the black body.
Strong, straight black 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。
Eurasian Magpie
動物で初めて鏡像認識テストに合格した非哺乳類の鳥。高い知性を持つカラス科の鳥。