Arctic Tern vs Common Nightingale
Sterna paradisaea 比較対象 Luscinia megarhynchos
Side-by-Side Comparison
| 属性 | Arctic Tern | Common Nightingale |
|---|---|---|
| 学名 | Sterna paradisaea | Luscinia megarhynchos |
| 目 | Charadriiformes | Passeriformes |
| 科 | Laridae | Muscicapidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 34.0 cm (13.4 in) | 16.5 cm (6.5 in) |
| 翼開長 | 80.0 cm (31.5 in) | 25.0 cm (9.8 in) |
| 体重 | 110.0 g (3.88 oz) | 21.0 g (0.74 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Insects and larvae, supplemented with berries in autumn. Forages on or near the ground in … |
| 一腹卵数 | 2-3 | 4-5 |
| 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.
Common Nightingale
Dense thickets, scrub, and undergrowth in deciduous woodland. Prefers areas with thick ground cover near water.
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.
Common Nightingale
Considered Europe's finest songster: an extraordinarily rich, loud, flute-like melody of bubbling trills, slow whistles, and a distinctive crescendo 'lu-lu-lu'. Sings day and night.
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.
Common Nightingale
Breeds in Europe and western Asia. Winters in sub-Saharan Africa. A long-distance migrant crossing the Sahara.
保全状況
Arctic Tern
Common Nightingale
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
Common Nightingale
Plain warm brown upperparts with a rufous-chestnut tail. Pale greyish-white underparts. Unremarkable appearance belies its remarkable voice.
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。
Common Nightingale
サヨナキドリ（Luscinia megarhynchos）— ヨーロッパ・中央アジアに分布し、アフリカで越冬する。夜間にも聴こえる複雑で豊かな歌声で知られる。