Long-tailed Jaeger vs Pomarine Jaeger
Stercorarius longicaudus 比較対象 Stercorarius pomarinus
Side-by-Side Comparison
| 属性 | Long-tailed Jaeger | Pomarine Jaeger |
|---|---|---|
| 学名 | Stercorarius longicaudus | Stercorarius pomarinus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Stercorariidae | Stercorariidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 60.3 cm (23.7 in) | 70.2 cm (27.6 in) |
| 体重 | 315.75 g (11.14 oz) | 760.5 g (26.83 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-2 | 2 |
| Population Trend | — | — |
Habitat Comparison
保全状況
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.