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Side-by-Side Comparison

속성	Arctic Tern	Forster's Tern
학명	Sterna paradisaea	Sterna forsteri
목	Charadriiformes	Charadriiformes
과	Laridae	Laridae
보전 상태	Least Concern	Least Concern
체장	34.0 cm (13.4 in)	—
날개 폭	80.0 cm (31.5 in)	50.5 cm (19.9 in)
체중	110.0 g (3.88 oz)	151.25 g (5.34 oz)
식성	Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving.	--
산란 수	2-3	2-3
Population Trend	—	—

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Size Comparison

Body Length

Arctic Tern 34.0 cm

Forster's Tern —

날개 폭

Arctic Tern 80.0 cm

Forster's Tern 50.5 cm

체중

Arctic Tern 110.0 g

Forster's Tern 151.25 g

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Habitat Comparison

공유 서식지

🌿 Wetland 🏖️ Coastal

Arctic Tern only

🌾 Grassland

Forster's Tern only

없음

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.

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Song & Call Comparison

Arctic Tern

노래

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.

Forster's Tern

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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.

Forster's Tern

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보전 상태

Least Concern

Arctic Tern

Least Concern

Forster's Tern

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How to Tell Them Apart

Arctic Tern

깃털

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.

부리

Slender, pointed, bright red bill

Forster's Tern

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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.

Forster's Tern

Forster's Tern, 33–36 cm, breeds in interior North American marshes and winters along both US coasts and into Mexico. Distinctive frosted silver upperparts and orange-based bill. In non-breeding plumage, shows a black eye-mask. Piscivore; hovers and plunge-dives in coastal bays and lagoons.

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Related Comparisons

왕관앵무 vs Arctic Tern

look-alike

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