Arctic Tern vs Common Blackbird
Sterna paradisaea 对比 Turdus merula
Side-by-Side Comparison
| 属性 | Arctic Tern | Common Blackbird |
|---|---|---|
| 学名 | Sterna paradisaea | Turdus merula |
| 目 | Charadriiformes | Passeriformes |
| 科 | Laridae | Turdidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 34.0 cm (13.4 in) | 25.0 cm (9.8 in) |
| 翼展 | 80.0 cm (31.5 in) | 36.0 cm (14.2 in) |
| 体重 | 110.0 g (3.88 oz) | 100.0 g (3.53 oz) |
| 食性 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Earthworms, insects, berries, and fruit. Forages on the ground, turning over leaf litter. Famously pulls … |
| 产卵数 | 2-3 | 3-5 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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.
Common Blackbird
Woodland, hedgerows, gardens, and parks. One of the most common garden birds across Europe.
Song & Call Comparison
Arctic Tern
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.
Common Blackbird
Arguably Britain's finest songster: rich, flute-like phrases with deep, mellow quality. Sings persistently at dusk. Alarm is a sharp 'chook-chook'. Song includes liquid 'pew' notes.
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.
Common Blackbird
Europe, Asia, and North Africa. Introduced to Australia and New Zealand. Northern populations are migratory.
保护状况
Arctic Tern
Common Blackbird
How to Tell Them Apart
Arctic Tern
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.
Slender, pointed, bright red bill
Common Blackbird
Males are jet black with a bright yellow-orange bill and eye-ring. Females are dark brown with mottled underparts and a dull yellowish bill.
Bright yellow-orange bill in males, dull brownish in females
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。
Common Blackbird
欧洲乌鸫（Turdus merula）— 广泛分布于欧洲的鸫科鸟类。雄鸟全身黑色，嘴黄色；雌鸟棕色。栖息于花园和森林，鸣声悦耳动听。