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MarineCavity nestSmall · 37 gID tip
Ainley's storm petrel is a medium-sized species about 18 cm (7.1 in) long, with fairly long wings with blunt points, and a moderately long, forked tail. The general colour is dark sooty-brown but from a distance this appears black; pre-moult adults may look more brownish when the plumage is worn. The rump is white, a U-shaped white patch having a central poorly defined dark area. The beak, legs and feet are black, and the feet do not extend beyond the tail in flight. It is only slightly different from other related species such as the Townsend's storm petrel and Leach's storm petrel
Text from Wikipedia, licensed CC BY-SA 4.0.
When to see the Ainley's Storm Petrel
One bar for each month. Filled bars are the 4 months with records; pale bars are months with none. The wide bar is November, the month with the most records.
About the Ainley's Storm Petrel
Ainley's storm petrel is a species of seabird in the family Hydrobatidae. It breeds in the winter on Guadalupe Island off the western coast of Mexico. It ranges south to the Galápagos Islands. It is considered by some authorities to be a subspecies of Leach's storm petrel.
Text adapted from Wikipedia, licensed CC BY-SA 4.0.
Easily confused with
Townsend's Storm PetrelHydrobates socorroensisTownsend's storm petrel is a species of seabird in the family Hydrobatidae.
Leach's Storm PetrelHydrobates leucorhousLeach's petrel is a small bird at 18–21 cm in length with a 43–48 cm wingspan.
Cape Verde Storm PetrelHydrobates jabejabeThis bird is darker in plumage and the white rump is less conspicuous than Leach's storm petrel.
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