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Side-by-Side Comparison

属性	Arctic Tern	Black-bellied Tern
学名	Sterna paradisaea	Sterna acuticauda
目	Charadriiformes	Charadriiformes
科	Laridae	Laridae
保护状况	Least Concern	Endangered
体长	34.0 cm (13.4 in)	—
翼展	80.0 cm (31.5 in)	44.8 cm (17.6 in)
体重	110.0 g (3.88 oz)	159.5 g (5.63 oz)
食性	Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving.	--
产卵数	2-3	2-3
Population Trend	—	—

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Size Comparison

Body Length

Arctic Tern 34.0 cm

Black-bellied Tern —

翼展

Arctic Tern 80.0 cm

Black-bellied Tern 44.8 cm

体重

Arctic Tern 110.0 g

Black-bellied Tern 159.5 g

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Habitat Comparison

共同栖息地

🌿 Wetland

Arctic Tern only

🌾 Grassland 🏖️ Coastal

Black-bellied 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.

Black-bellied 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.

Black-bellied Tern

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保护状况

Least Concern

Arctic Tern

Endangered

Black-bellied 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

Black-bellied 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。

Black-bellied Tern

Black-bellied Tern, 32–34 cm, is an Endangered freshwater tern of the Indian subcontinent, breeding on large river sandbars from Pakistan to Myanmar. Black belly contrasts with grey upperparts in breeding plumage; orange bill. Plunge-dives for small fish. Severely threatened by river modification.

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Related Comparisons

雞尾鸚鵡 vs Arctic Tern

look-alike

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