Aleutian Tern vs Ross's Gull
Onychoprion aleuticus 对比 Rhodostethia rosea
Side-by-Side Comparison
| 属性 | Aleutian Tern | Ross's Gull |
|---|---|---|
| 学名 | Onychoprion aleuticus | Rhodostethia rosea |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保护状况 | Vulnerable | Least Concern |
| 体长 | — | — |
| 翼展 | 52.4 cm (20.6 in) | 50.2 cm (19.8 in) |
| 体重 | 104.88 g (3.70 oz) | 185.0 g (6.53 oz) |
| 食性 | -- | -- |
| 产卵数 | 1-4 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
保护状况
Vulnerable
Aleutian Tern
Least Concern
Ross's 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.
Ross's Gull
Ross's Gull, 29–32 cm, is a delicate Arctic gull breeding in Siberian tundra, with its winter range largely unknown — possibly far out in the pack ice. Rosy flush to underparts in breeding plumage; wedge-shaped tail; black neck ring. Feeds on invertebrates and small fish along ice edges.