Caspian Tern vs Aleutian Tern
Hydroprogne caspia so với Onychoprion aleuticus
Side-by-Side Comparison
| Thuộc Tính | Caspian Tern | Aleutian Tern |
|---|---|---|
| Tên Khoa Học | Hydroprogne caspia | Onychoprion aleuticus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 82,1 cm (32.3 in) | 52,4 cm (20.6 in) |
| Khối Lượng | 656,0 g (23.14 oz) | 104,88 g (3.70 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2-4 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Tình Trạng Bảo Tồn
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.