Arctic Tern vs Great Cormorant
Sterna paradisaea 比較対象 Phalacrocorax carbo
Side-by-Side Comparison
| 属性 | Arctic Tern | Great Cormorant |
|---|---|---|
| 学名 | Sterna paradisaea | Phalacrocorax carbo |
| 目 | Charadriiformes | Suliformes |
| 科 | Laridae | Phalacrocoracidae |
| 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) | 145.0 cm (57.1 in) |
| 体重 | 110.0 g (3.88 oz) | 2600.0 g (91.71 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Fish caught by diving from the surface. Pursues prey underwater using powerful feet for propulsion. … |
| 一腹卵数 | 2-3 | 1-7 |
| 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.
Great Cormorant
Coasts, estuaries, lakes, rivers, and reservoirs. Nests in colonies in trees, on cliffs, or on the ground.
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.
Great Cormorant
Deep, guttural grunts and 'karrr' calls at colonies. Bill-clicking and hissing in threat displays. Silent at sea. Colonial noise can be deafening during the breeding season.
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.
Great Cormorant
Very wide range across Europe, Asia, Africa, and Australasia. One of the most widespread cormorant species.
保全状況
Arctic Tern
Great Cormorant
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
Great Cormorant
All black with a bronze-green gloss. White throat patch and white thigh patches in breeding season. Yellow-orange face patch around the bill base.
Long, hooked, dark bill with a yellow gape
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。
Great Cormorant
The great cormorant is one of the most widespread seabirds in the world. Unlike most waterbirds, cormorants lack fully waterproof plumage, leading to the iconic pose of standing with wings spread open to dry. In Asia, cormorants have been used by fishermen to catch fish for over a thousand years.