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Ashy Storm Petrel - BirdForum Opus

Photo by Glen Tepke
Photo taken in Pacific west of Carmel, California, USA, Ausust 2003.
Hydrobates homochroa

Oceanodroma homochroa


Length 8" (20 cm), wingspan 17-18" (43-46 cm). Grey-brown, paler than other storm-petrels found in range, pale grey-brown underwing coverts, carpal bars and edges of upper tail coverts. Wingbeats shallow and rapid, glides less than other storm-petrels.


North and Central America: breeds on islands off California; ranges to southern Baja California Mexico.

Rated Near Threatened by BirdLife International[2], Red category on the Audubon Watchlist.


This is a monotypic species.[1]



The diet includes fish, squid, crustaceans and krill.


They lay one egg in a nest in a rock burrow. Like most petrels they return to the nest at night to feed the chick, with both adults taking responsibility for incubating and rearing the young.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
  2. BirdLife International
  3. Whatbird

Recommended Citation

External Links

To search for the scientific name Hydrobates homochroa, use;

To search for the scientific name Oceanodroma homochroa, use;

To search for the common name Ashy Storm Petrel, use;

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