A project of Pacific Procellariid Research Consortium.
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Species: Sooty Shearwater
Life Stage: Sub-Adult to Adult
Release Date: 2005-05-15 06:12:00
Release Location: Columbia River Plume
Last Location: 2005-06-14 21:18:29
The sooty shearwater is a long-lived, wide-ranging pelagic seabird. This bird nests on sub-Antarctic islands off New Zealand, Tasmania, and Chile. After nesting in the Southern Hemisphere, shearwaters undertake long-distance migrations to feed in the productive waters of the Northern Hemisphere's California Current. Off the Oregon and Washington coasts, sooty shearwaters are the most abundant seabird during May to September. Aggregations of up to 20,000 birds have been observed near river mouths, on the boundary between freshwater outflow from land and saltwater in the ocean. Large tornado-like flocks ("sooty swirls") participate in feeding frenzies on schooling fish, often in the company of many other species of marine birds and mammals.