Aleutian Tern vs Ivory Gull
Onychoprion aleuticus 对比 Pagophila eburnea
Side-by-Side Comparison
| 属性 | Aleutian Tern | Ivory Gull |
|---|---|---|
| 学名 | Onychoprion aleuticus | Pagophila eburnea |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Near Threatened |
| 体长 | — | — |
| 翼展 | 52.4 cm (20.6 in) | 66.7 cm (26.3 in) |
| 体重 | 104.88 g (3.70 oz) | 578.3333333333334 g (20.40 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-4 | 2 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Aleutian Tern
Near Threatened
Ivory Gull
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.
Ivory Gull
Ivory Gull, 40–43 cm, is entirely white with black legs, breeding only on High Arctic ice caps and cliffs in Canada, Greenland, Svalbard, and Russia. Winters at sea ice edges in the High Arctic. Scavenges on marine mammal carcasses and sea ice invertebrates. Near Threatened; climate-sensitive.