Aleutian Tern vs Red-legged Kittiwake
Onychoprion aleuticus so với Rissa brevirostris
Side-by-Side Comparison
| Thuộc Tính | Aleutian Tern | Red-legged Kittiwake |
|---|---|---|
| Tên Khoa Học | Onychoprion aleuticus | Rissa brevirostris |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Vulnerable | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 52,4 cm (20.6 in) | 60,0 cm (23.6 in) |
| Khối Lượng | 104,88 g (3.70 oz) | 401,6666666666667 g (14.17 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Aleutian Tern only
Red-legged Kittiwake only
Không
Tình Trạng Bảo Tồn
Vulnerable
Aleutian Tern
Vulnerable
Red-legged Kittiwake
About These Birds
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.
Red-legged Kittiwake
Red-legged Kittiwake, 35–39 cm, has a very restricted range on only four Aleutian and Pribilof Island colonies, with a world population under 200,000. Resembles Black-legged Kittiwake but with bright red legs, darker upperparts, and white underwing tips. Pelagic piscivore; Vulnerable and declining.