Arctic Tern vs Demoiselle Crane
Sterna paradisaea 比較対象 Anthropoides virgo
Side-by-Side Comparison
| 属性 | Arctic Tern | Demoiselle Crane |
|---|---|---|
| 学名 | Sterna paradisaea | Anthropoides virgo |
| 目 | Charadriiformes | Gruiformes |
| 科 | Laridae | Gruidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 34.0 cm (13.4 in) | 90.0 cm (35.4 in) |
| 翼開長 | 80.0 cm (31.5 in) | 175.0 cm (68.9 in) |
| 体重 | 110.0 g (3.88 oz) | 2500.0 g (88.18 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Seeds, grasses, insects, snails, worms, and small vertebrates. Forages in grasslands and agricultural fields. |
| 一腹卵数 | 2-3 | 2 |
| 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.
Demoiselle Crane
Dry grasslands, savannas, and semi-desert. Nests on the ground in open country, often near water. Winters in agricultural fields.
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.
Demoiselle Crane
A high-pitched, bugling 'karr-r-r' in flight. Also gives softer clucking and purring contact calls. Migrating flocks produce a continuous musical babbling audible from great distance.
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.
Demoiselle Crane
Central Eurasia from the Black Sea to Mongolia and northeastern China. Winters in India and sub-Saharan Africa.
保全状況
Arctic Tern
Demoiselle Crane
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
Demoiselle Crane
Pale blue-grey body with a black head, neck, and breast plumes. White ear tufts extend behind the red eyes. Long black tertials drape over the tail.
Short, yellowish-olive bill, shorter than other cranes
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。
Demoiselle Crane
The demoiselle crane is the smallest crane species but undertakes one of the most grueling migrations, crossing the Himalayas at altitudes over 8,000 meters to reach wintering grounds in India. Named for its elegant appearance by Marie Antoinette, it is the second most abundant crane species in the world.