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Side-by-Side Comparison

属性	Arctic Tern	Black Skimmer
学名	Sterna paradisaea	Rynchops niger
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)	73.1 cm (28.8 in)
体重	110.0 g (3.88 oz)	293.6666666666667 g (10.36 oz)
食性	Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving.	--
产卵数	2-3	1-6
Population Trend	—	—

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Size Comparison

Body Length

Arctic Tern 34.0 cm

Black Skimmer —

翼展

Arctic Tern 80.0 cm

Black Skimmer 73.1 cm

体重

Arctic Tern 110.0 g

Black Skimmer 293.6666666666667 g

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Habitat Comparison

共同栖息地

🌿 Wetland 🏖️ Coastal

Arctic Tern only

🌾 Grassland

Black Skimmer 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 Skimmer

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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 Skimmer

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保护状况

Least Concern

Arctic Tern

Least Concern

Black Skimmer

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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 Skimmer

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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 Skimmer

Black Skimmer: 40–50 cm, the largest skimmer with jet black upperparts, white underparts, and an outsized red-and-black bill with protruding lower mandible. Inhabits large rivers, estuaries, and coastal lagoons of North and South America. Feeds at dawn and dusk by skimming water surface. Nests colonially on sandy beaches. Partly migratory.

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Related Comparisons

雞尾鸚鵡 vs Arctic Tern

look-alike

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