Long-tailed Jaeger vs Pomarine Jaeger
Stercorarius longicaudus so với Stercorarius pomarinus
Side-by-Side Comparison
| Thuộc Tính | Long-tailed Jaeger | Pomarine Jaeger |
|---|---|---|
| Tên Khoa Học | Stercorarius longicaudus | Stercorarius pomarinus |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Stercorariidae | Stercorariidae |
| Tình Trạng Bảo Tồn | Least Concern | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 60,3 cm (23.7 in) | 70,2 cm (27.6 in) |
| Khối Lượng | 315,75 g (11.14 oz) | 760,5 g (26.83 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 1-2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Long-tailed Jaeger only
Không
Pomarine Jaeger only
Tình Trạng Bảo Tồn
Least Concern
Long-tailed Jaeger
Least Concern
Pomarine Jaeger
About These Birds
Long-tailed Jaeger
Long-tailed Jaeger, 48–53 cm body plus up to 25 cm tail streamers, is the most elegant jaeger, breeding on Arctic and sub-Arctic tundra worldwide. Feeds primarily on lemmings on the breeding grounds; transitions to pelagic planktivore and piscivore on the ocean. Migrates to subantarctic waters — one of the longest migrations.
Pomarine Jaeger
Pomarine Jaeger, 46–51 cm plus twisted spoon-shaped central tail feathers, is the largest of the three small jaegers. Breeds on Russian and Canadian Arctic tundra; lemming-dependent on breeding grounds. Heavily built; pirates food from other seabirds at sea and scavenges at whale carcasses. Pelagic in winter.