Slaty-backed Gull vs Aleutian Tern
Larus schistisagus so với Onychoprion aleuticus
Side-by-Side Comparison
| Thuộc Tính | Slaty-backed Gull | Aleutian Tern |
|---|---|---|
| Tên Khoa Học | Larus schistisagus | Onychoprion aleuticus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 87,0 cm (34.3 in) | 52,4 cm (20.6 in) |
| Khối Lượng | 1280,5 g (45.17 oz) | 104,88 g (3.70 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-4 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Slaty-backed Gull only
Không
Aleutian Tern only
Tình Trạng Bảo Tồn
Least Concern
Slaty-backed Gull
Vulnerable
Aleutian Tern
About These Birds
Slaty-backed Gull
Slaty-backed Gull, 55–68 cm, breeds on coasts and cliffs of the Russian Far East, wintering south to Japan and occasionally the US Pacific coast. Dark slate-grey mantle, pink legs, 'string of pearls' white mirrors on outer wing. Omnivore; scavenges at fishing ports in East Asian harbours.
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.