Ainley's Storm-petrel vs Matsudaira's Storm-petrel
Hydrobates cheimomnestes compared with Hydrobates matsudairae
Side-by-Side Comparison
| Attribute | Ainley's Storm-petrel | Matsudaira's Storm-petrel |
|---|---|---|
| Scientific Name | Hydrobates cheimomnestes | Hydrobates matsudairae |
| Order | Procellariiformes | Procellariiformes |
| Family | Hydrobatidae | Hydrobatidae |
| Conservation Status | Vulnerable | Vulnerable |
| Length | — | — |
| Wingspan | 30.1 cm (11.9 in) | 37.0 cm (14.6 in) |
| Weight | 41.15 g (1.45 oz) | 62.0 g (2.19 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | -- |
| Population Trend | — | — |
Conservation Status
Vulnerable
Ainley's Storm-petrel
Vulnerable
Matsudaira's Storm-petrel
About These Birds
Ainley's Storm-petrel
Ainley's Storm-petrel, 19–21 cm, is a recently described species breeding on the Channel Islands off California, present in winter — unusual among storm-petrels which typically breed in summer. Dark overall, white rump with central grey stripe. Vulnerable; small population and restricted range.
Matsudaira's Storm-petrel
Matsudaira's Storm-petrel, 24–26 cm, is a large, all-dark storm-petrel breeding on Volcano and Ryukyu Islands of Japan. Long-winged, slow flapping flight. Winters off East Africa and the Arabian Sea — an Indian Ocean migrant from North Pacific colonies. Planktivore and surface feeder.