Ancient Murrelet vs Japanese Murrelet
Synthliboramphus antiquus 比較対象 Synthliboramphus wumizusume
Side-by-Side Comparison
| 属性 | Ancient Murrelet | Japanese Murrelet |
|---|---|---|
| 学名 | Synthliboramphus antiquus | Synthliboramphus wumizusume |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Alcidae | Alcidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | — |
| 翼開長 | 27.1 cm (10.7 in) | 24.0 cm (9.4 in) |
| 体重 | 208.16666666666666 g (7.34 oz) | 171.6 g (6.05 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Least Concern
Ancient Murrelet
Vulnerable
Japanese Murrelet
About These Birds
Ancient Murrelet
Ancient Murrelet, 24–27 cm, breeds in burrows on North Pacific islands from British Columbia to Japan. Black hood, grey back, white underparts with yellow bill. Nocturnal at colonies to avoid predators. Chicks lead-march to sea within days of hatching — abandoning the nest very early. Planktivore and piscivore.
Japanese Murrelet
Japanese Murrelet, 26–28 cm, is a Vulnerable alcid endemic to Japan, breeding on rocky islets in the Pacific. Black head with a small white supercilium stripe; grey back. Nests in rock crevices; chicks led to sea while still tiny. Piscivore; threatened by gill-net bycatch and feral predators on islands.