A project of Pacific Procellariid Research Consortium.
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Species: Sooty Shearwater
Life Stage: Sub-Adult to Adult
Release Date: 2004-07-04 08:18:00
Release Location: Capitola
Last Location: 2004-08-07 12:12:15
Sooty Shearwaters are the most abundant and perhaps the most conspicuous seabird observed off the west coast of North America during May to September- single flocks can number in the 10–100s of thousands of individuals. Shearwaters that have migrated here from breeding colonies in New Zealand and Chile rely on abundant and predictable concentrations of prey to rebuild energy reserves, undergo energetically expensive molt, and store lipids prior to re-migration across the Pacific. The energetic requirements of such massive flocks require that they locate and forage successfully on large shoals of forage fish such as anchovy and sardine. It has been estimated that Sooty Shearwaters off Oregon consume more than 24,000 MT of anchovies per year.