Caspian Tern vs Aleutian Tern
Hydroprogne caspia 对比 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Caspian Tern | Aleutian Tern |
|---|---|---|
| 学名 | Hydroprogne caspia | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Least Concern | Vulnerable |
| 体长 | — | — |
| 翼展 | 82.1 cm (32.3 in) | 52.4 cm (20.6 in) |
| 体重 | 656.0 g (23.14 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 产卵数 | 2-4 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Least Concern
Caspian Tern
Vulnerable
Aleutian Tern
About These Birds
Caspian Tern
Caspian Tern is the world's largest tern, 48–56 cm, wingspan 127–140 cm, with a massive blood-red bill. Found on all continents except Antarctica. Plunge-dives powerfully for large fish in coastal and freshwater habitats. Migratory; northern populations winter in the tropics. Loud, rasping call.
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.