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Townsend's Storm Petrel - BirdForum Opus

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Photo © by Glen Tepke
Pacific, west of San Diego, California, USA, 17 August, 2019
Hydrobates socorroensis

Oceanodroma socorroensis


8-21 cm. Dark plumage and white rump with a black line through it. Forked tail


Photo © by Glen Tepke
Pacific, west of San Diego, California, USA, 17 August, 2019

Summer breeder on islets off Guadalupe Island (western Mexico); ranges in eastern Pacific north to southern California and south to ca 10º N

Outside breeding season pelagic.


This is a monotypic species.
Has been considered conspecific with Leach's Storm Petrel and Ainley's Storm Petrel in the past.


Close to the sea in well concealed areas such as rock crevices, shallow burrows.

Can turn up on lakes and reservoirs, many miles inland, as a result of storms



1 white egg is laid. Visits the nest only at night


Small fish and crustaceans


  1. Clements, J. F., P. C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of Birds of the World: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F and D Donsker (Eds). 2016. IOC World Bird Names (version 6.3). Available at http://www.worldbirdnames.org/.

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