Ancient Murrelet vs Craveri's Murrelet
Synthliboramphus antiquus เปรียบเทียบกับ Synthliboramphus craveri
Side-by-Side Comparison
| คุณสมบัติ | Ancient Murrelet | Craveri's Murrelet |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Synthliboramphus antiquus | Synthliboramphus craveri |
| อันดับ | Charadriiformes | Charadriiformes |
| วงศ์ตระกูล | Alcidae | Alcidae |
| สถานะการอนุรักษ์ | Least Concern | Vulnerable |
| ความยาว | — | — |
| กว้างปีก | 27.1 cm (10.7 in) | 23.9 cm (9.4 in) |
| น้ำหนัก | 208.16666666666666 g (7.34 oz) | 150.5 g (5.31 oz) |
| อาหาร | -- | -- |
| จำนวนไข่ | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
สถานะการอนุรักษ์
Least Concern
Ancient Murrelet
Vulnerable
Craveri's 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.
Craveri's Murrelet
Craveri's Murrelet, 21–23 cm, breeds on Gulf of California islands, dispersing into the Pacific after breeding. Darkest Synthliboramphus murrelet; less white on face than Scripps's. Near Threatened; small population threatened by introduced predators on nesting islands and bycatch in gill nets.