Cassin's Auklet vs Ancient Murrelet
Ptychoramphus aleuticus 比較対象 Synthliboramphus antiquus
Side-by-Side Comparison
| 属性 | Cassin's Auklet | Ancient Murrelet |
|---|---|---|
| 学名 | Ptychoramphus aleuticus | Synthliboramphus antiquus |
| 目 | Charadriiformes | Charadriiformes |
| 科 | Alcidae | Alcidae |
| 保全状況 | Near Threatened | Least Concern |
| 体長 | — | — |
| 翼開長 | 24.2 cm (9.5 in) | 27.1 cm (10.7 in) |
| 体重 | 175.0 g (6.17 oz) | 208.16666666666666 g (7.34 oz) |
| 食性 | -- | -- |
| 一腹卵数 | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
保全状況
Near Threatened
Cassin's Auklet
Least Concern
Ancient Murrelet
About These Birds
Cassin's Auklet
Cassin's Auklet, 21–23 cm, is a small, almost entirely dark grey auklet breeding in burrows on rocky North Pacific islands from Baja California to the Aleutians. Feeds almost exclusively on zooplankton — euphausiids and copepods — at night. Highly colonial; winters near shore.
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.