Arctic Tern vs Black-headed Gull
Sterna paradisaea 对比 Larus ridibundus
Side-by-Side Comparison
| 属性 | Arctic Tern | Black-headed Gull |
|---|---|---|
| 学名 | Sterna paradisaea | Larus ridibundus |
| 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) | 58.2 cm (22.9 in) |
| 体重 | 110.0 g (3.88 oz) | 261.0 g (9.21 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 | — | — |
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.
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.
Black-headed Gull
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-headed Gull
保护状况
Arctic Tern
Black-headed Gull
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
Black-headed Gull
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-headed Gull
黑头鸥（约280克）是欧洲最常见的鸥类之一，繁殖期具有巧克力棕色头部（非黑色）。广布于欧洲至亚洲的淡水和沿海区域，越冬于南欧和北非。以昆虫、蠕虫、鱼类和腐肉为食。无危；高度适应城市环境，在许多城市的公园和湖泊中常见。