Western Gull vs Aleutian Tern
Larus occidentalis 比較対象 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Western Gull | Aleutian Tern |
|---|---|---|
| 学名 | Larus occidentalis | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 79.5 cm (31.3 in) | 52.4 cm (20.6 in) |
| 体重 | 957.5 g (33.77 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1-5 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Western Gull
Vulnerable
Aleutian Tern
About These Birds
Western Gull
Western Gull, 55–68 cm, is the dominant large gull on the US Pacific coast from Washington to Baja California. Dark-mantled with pink legs, yellow bill with red spot. Omnivore; breeds on offshore islands, scavenges at harbours and landfills. Non-migratory; resident along its breeding coast.
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.