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Side-by-Side Comparison

属性	Brown Noddy	Arctic Tern
学名	Anous stolidus	Sterna paradisaea
目	Charadriiformes	Charadriiformes
科	Laridae	Laridae
保护状况	Least Concern	Least Concern
体长	—	34.0 cm (13.4 in)
翼展	53.1 cm (20.9 in)	80.0 cm (31.5 in)
体重	184.66666666666666 g (6.51 oz)	110.0 g (3.88 oz)
食性	--	Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving.
产卵数	1	2-3
Population Trend	—	—

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Size Comparison

Body Length

Brown Noddy —

Arctic Tern 34.0 cm

翼展

Brown Noddy 53.1 cm

Arctic Tern 80.0 cm

体重

Brown Noddy 184.66666666666666 g

Arctic Tern 110.0 g

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Habitat Comparison

共同栖息地

🏖️ Coastal

Brown Noddy only

无

Arctic Tern only

🌿 Wetland 🌾 Grassland

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

Brown Noddy

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.

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Geographic Range & Migration

Brown Noddy

Arctic Tern

Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.

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保护状况

Least Concern

Brown Noddy

Least Concern

Arctic Tern

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How to Tell Them Apart

Brown Noddy

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

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About These Birds

Brown Noddy

Brown Noddy: 38–45 cm, wingspan 75–86 cm, chocolate-brown tropical tern with a white cap fading to grey on the forehead and a wedge-shaped tail. Highly abundant colonial seabird nesting on oceanic islands and coral atolls throughout tropical and subtropical oceans. Plunge-dives for small fish and invertebrates. Long-lived. Partly migratory.

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。

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Related Comparisons

雞尾鸚鵡 vs Arctic Tern

look-alike

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