Ancient Murrelet vs Japanese Murrelet
Synthliboramphus antiquus so với Synthliboramphus wumizusume
Side-by-Side Comparison
| Thuộc Tính | Ancient Murrelet | Japanese Murrelet |
|---|---|---|
| Tên Khoa Học | Synthliboramphus antiquus | Synthliboramphus wumizusume |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Alcidae | Alcidae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 27,1 cm (10.7 in) | 24,0 cm (9.4 in) |
| Khối Lượng | 208,16666666666666 g (7.34 oz) | 171,6 g (6.05 oz) |
| Chế Độ Ăn | -- | -- |
| Số Trứng | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
Ancient Murrelet only
Japanese Murrelet only
Không
Tình Trạng Bảo Tồn
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.