Great Black-backed Gull vs Aleutian Tern
Larus marinus so với Onychoprion aleuticus
Side-by-Side Comparison
| Thuộc Tính | Great Black-backed Gull | Aleutian Tern |
|---|---|---|
| Tên Khoa Học | Larus marinus | Onychoprion aleuticus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 95,6 cm (37.6 in) | 52,4 cm (20.6 in) |
| Khối Lượng | 1678,3333333333333 g (59.20 oz) | 104,88 g (3.70 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Great Black-backed Gull only
Không
Aleutian Tern only
Không
Tình Trạng Bảo Tồn
Least Concern
Great Black-backed Gull
Vulnerable
Aleutian Tern
About These Birds
Great Black-backed Gull
Great Black-backed Gull, 61–74 cm, wingspan 142–168 cm, is the world's largest gull, breeding along North Atlantic coasts. Jet-black mantle, white body, massive yellow bill. Dominant predator among seabirds; preys on seabird chicks, puffins, rabbits, as well as scavenging. Partially migratory.
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.