Arctic Tern vs Kerguelen Tern
Sterna paradisaea 비교 대상 Sterna virgata
Side-by-Side Comparison
| 속성 | Arctic Tern | Kerguelen Tern |
|---|---|---|
| 학명 | Sterna paradisaea | Sterna virgata |
| 목 | Charadriiformes | Charadriiformes |
| 과 | Laridae | Laridae |
| 보전 상태 | Least Concern | Near Threatened |
| 체장 | 34.0 cm (13.4 in) | — |
| 날개 폭 | 80.0 cm (31.5 in) | 50.0 cm (19.7 in) |
| 체중 | 110.0 g (3.88 oz) | 127.5 g (4.50 oz) |
| 식성 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| 산란 수 | 2-3 | 1-2 |
| 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.
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.
Kerguelen Tern
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.
Kerguelen Tern
보전 상태
Arctic Tern
Kerguelen Tern
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
Kerguelen Tern
About These Birds
Arctic Tern
북극제비갈매기는 모든 동물 중 가장 긴 이동 기록을 보유하고 있어, 매년 북극에서 남극까지 약 7만 km를 왕복합니다. 약 30년의 수명 동안 달을 세 번 왕복하는 거리를 날아다닙니다. 지구상 어떤 생물보다 많은 일광을 경험하는 놀라운 새입니다.
Kerguelen Tern
Kerguelen Tern, 31–33 cm, is restricted to a handful of sub-Antarctic islands including Kerguelen and Crozet. Darker grey than Antarctic Tern, with reddish bill. Piscivore and invertivore; forages in kelp beds and coastal waters. Near Threatened; small, isolated population vulnerable to introduced predators.