Ainley's Storm-petrel vs Townsend's Storm-petrel
Hydrobates cheimomnestes compared with Hydrobates socorroensis
Side-by-Side Comparison
| Attribute | Ainley's Storm-petrel | Townsend's Storm-petrel |
|---|---|---|
| Scientific Name | Hydrobates cheimomnestes | Hydrobates socorroensis |
| Order | Procellariiformes | Procellariiformes |
| Family | Hydrobatidae | Hydrobatidae |
| Conservation Status | Vulnerable | Endangered |
| Length | — | — |
| Wingspan | 30.1 cm (11.9 in) | 30.1 cm (11.9 in) |
| Weight | 41.15 g (1.45 oz) | 33.2 g (1.17 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Conservation Status
Vulnerable
Ainley's Storm-petrel
Endangered
Townsend'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.
Townsend's Storm-petrel
Townsend's Storm-petrel, 19–21 cm, breeds on Guadalupe and San Benedicto Islands off western Mexico. Recently split from Leach's Storm-petrel. Forked white rump, dark overall. Pelagic in eastern Pacific; planktivore. Conservation status uncertain; threatened by introduced predators at small nesting island colonies.