Black-headed Gull vs Aleutian Tern
Larus ridibundus 对比 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Black-headed Gull | Aleutian Tern |
|---|---|---|
| 学名 | Larus ridibundus | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Vulnerable |
| 体长 | — | — |
| 翼展 | 58.2 cm (22.9 in) | 52.4 cm (20.6 in) |
| 体重 | 261.0 g (9.21 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Black-headed Gull
Vulnerable
Aleutian Tern
About These Birds
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。
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.