Ainley's Storm-petrel vs Black Storm-petrel
Hydrobates cheimomnestes compared with Hydrobates melania
Side-by-Side Comparison
| Attribute | Ainley's Storm-petrel | Black Storm-petrel |
|---|---|---|
| Scientific Name | Hydrobates cheimomnestes | Hydrobates melania |
| Order | Procellariiformes | Procellariiformes |
| Family | Hydrobatidae | Hydrobatidae |
| Conservation Status | Vulnerable | Least Concern |
| Length | — | — |
| Wingspan | 30.1 cm (11.9 in) | 34.4 cm (13.5 in) |
| Weight | 41.15 g (1.45 oz) | 66.19999999999999 g (2.34 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Conservation Status
Vulnerable
Ainley's Storm-petrel
Least Concern
Black 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.
Black Storm-petrel
Black Storm-petrel, 22–23 cm, is the largest entirely dark storm-petrel of the eastern Pacific, breeding on San Benito Islands and Coronado Islands off Baja California. Deeply forked tail; languid, loping flight distinctive among storm-petrels. Planktivore and piscivore. Near Threatened; small breeding population.