Ainley's Storm-petrel vs Ringed Storm-petrel
Hydrobates cheimomnestes compared with Hydrobates hornbyi
Side-by-Side Comparison
| Attribute | Ainley's Storm-petrel | Ringed Storm-petrel |
|---|---|---|
| Scientific Name | Hydrobates cheimomnestes | Hydrobates hornbyi |
| Order | Procellariiformes | Procellariiformes |
| Family | Hydrobatidae | Hydrobatidae |
| Conservation Status | Vulnerable | Near Threatened |
| Length | — | — |
| Wingspan | 30.1 cm (11.9 in) | 32.6 cm (12.8 in) |
| Weight | 41.15 g (1.45 oz) | 39.25 g (1.38 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Vulnerable
Ainley's Storm-petrel
Near Threatened
Ringed 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.
Ringed Storm-petrel
Ringed Storm-petrel, 21–23 cm, is an extremely poorly known species with a highly restricted range over the Humboldt Current off Peru and Chile. White underparts with a distinctive dark breast band — giving the 'ringed' appearance. Breeding grounds unknown until recently; likely nests in Atacama Desert.