Abstract:
Introduction h e Farallon Islands, 35 km west of San Francisco, are home to the largest, most diverse seabird assemblage in the continental United States, including 50 % of the world population of Ashy storm petrel ( Oceanodroma homochroa ), which breeds here over the summer. From 1972 to 1992, the storm petrel population on Southeast Farallon Island declined by 34 %