Black Tern vs Aleutian Tern
Chlidonias niger 对比 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Black Tern | Aleutian Tern |
|---|---|---|
| 学名 | Chlidonias niger | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Vulnerable |
| 体长 | — | — |
| 翼展 | 40.3 cm (15.9 in) | 52.4 cm (20.6 in) |
| 体重 | 73.15 g (2.58 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 产卵数 | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Black Tern
Vulnerable
Aleutian Tern
About These Birds
Black Tern
黑浮鸥 (Chlidonias niger)，体长约22–24厘米。繁殖期头体黑色，翅和尾灰色；冬羽上体灰色，下体白色，头顶具黑色斑块。繁殖于北美和欧亚大陆的内陆湿地，冬季迁至热带海洋。以昆虫、小鱼和甲壳动物为食。
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.