Yellow-footed Gull vs Aleutian Tern
Larus livens 比較対象 Onychoprion aleuticus
Side-by-Side Comparison
| 属性 | Yellow-footed Gull | Aleutian Tern |
|---|---|---|
| 学名 | Larus livens | Onychoprion aleuticus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Laridae | Laridae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 80.7 cm (31.8 in) | 52.4 cm (20.6 in) |
| 体重 | 1295.0 g (45.68 oz) | 104.88 g (3.70 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 2-3 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Yellow-footed Gull
Vulnerable
Aleutian Tern
About These Birds
Yellow-footed Gull
Yellow-footed Gull, 53–58 cm, has a very restricted range — endemic to the Gulf of California with post-breeding dispersal to Salton Sea. Yellow feet (unique among large western gulls), yellow bill with red spot. Piscivore and scavenger; forages on rocky shores. Resident; does not undertake long migrations.
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.