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 EN    Ashy Storm-Petrel* Id (Atlas):
    Hydrobates homochroa

Description (10)
Image of Ashy Storm-Petrel
 

Family
Hydrobatidae (Northern Storm-petrels)

Size
18 - 21 cm

First Described (Guide)
(Coues, 1864)

Range (Guide)
Eastern Central Pacific (B) (NB), Mexico (B) (NB), USA (B) (NB).

Unknown to Ecuador.

Bird I, Farallon Is and Channel Is, off California (USA), south to Coronados Is (Mexico).
 
Population
Estimated population is 5,200 - 10,000 (2010) and decreasing.

Status EN
Pollution of forgaing areas, predation by introduced mammals, Western Gull (Larus occidentalis) and Barn Owl (Tyto alba), disturbance from human activity are the main threats.

For more information see BirdLife International Species Factsheet.

Food
Planktonic crustaceans, small fish. Aggregations coinciding spatially and seasonally with the spawning aggregations of sardines and anchovies.

Voice
A rising and falling purring at the nest.

Xeno-Canto Sound Files

 
Ashy Storm Petrel (Hydrobates homochroa) [XC77858]
     by Matthew L. Brady from Southeast Farallon Island, United States (call, purr)

 
Ashy Storm Petrel (Hydrobates homochroa) [XC838760]
     by id from San Francisco, San Francisco County, California, United States (call)

Nest
In rock crevices and burrows on offshore islands. In colonies.

Subspecies
May form superspecies with Leach's Storm-Petrel (Hydrobates leucorhous) and Swinhoe's Storm-Petrel (Hydrobates monorhis).

No subspecies.

Similar Species
Very similar to Black Storm-Petrel (Hydrobates melania) but paler, smaller and with a relatively longer tail that is held upswept in flight.


References
See References.


Files:
JPG files for Ashy Storm-Petrel (Hydrobates homochroa) - 10 files


More Information

BirdLife International

For more information about the Ashy Storm-Petrel see... Show Articles BirdLife International Species Factsheet.


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Where can I observe this species?
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