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Side-by-Side Comparison

属性	Arctic Tern	Least Tern
学名	Sterna paradisaea	Sternula antillarum
目	Charadriiformes	Charadriiformes
科	Laridae	Laridae
保护状况	Least Concern	Least Concern
体长	34.0 cm (13.4 in)	—
翼展	80.0 cm (31.5 in)	33.0 cm (13.0 in)
体重	110.0 g (3.88 oz)	46.75 g (1.65 oz)
食性	Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving.	--
产卵数	2-3	1-3
Population Trend	—	—

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Size Comparison

Body Length

Arctic Tern 34.0 cm

Least Tern —

翼展

Arctic Tern 80.0 cm

Least Tern 33.0 cm

体重

Arctic Tern 110.0 g

Least Tern 46.75 g

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Habitat Comparison

共同栖息地

🌿 Wetland 🏖️ Coastal

Arctic Tern only

🌾 Grassland

Least Tern only

无

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

鸣唱

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.

Least 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.

Least Tern

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保护状况

Least Concern

Arctic Tern

Least Concern

Least Tern

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How to Tell Them Apart

Arctic Tern

羽毛

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.

喙

Slender, pointed, bright red bill

Least Tern

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About These Birds

Arctic Tern

北极燕鸥进行所有动物中最长的迁徙，每年从北极繁殖地飞往南极越冬地，往返距离超过70,000公里。体型纤细，翼展约80厘米，全身主要为白色，具黑色头冠和红色喙。无危；繁殖于北极和亚北极海岸及岛屿，全球种群约200万只。

Least Tern

Least Tern is North America's smallest tern, 22–24 cm, breeding on sandy beaches and river sandbars from the Atlantic coast to the interior. Endangered (interior subspecies). Yellow bill, white forehead, grey upperparts. Hovers and plunge-dives for small fish in coastal and riverine habitats.

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Related Comparisons

雞尾鸚鵡 vs Arctic Tern

look-alike

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