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Tomales Bay supports roughly 20,000 shorebirds in early winter, qualifying as a wetland of international importance by the Western Hemisphere Shorebird Reserve Network. Since 1989, Audubon Canyon Ranch has been monitoring seasonal populations of shorebirds there, and the resulting data reveal some interesting and disturbing trends. Dr. Nils Warnock, Director of Conservation Science at Audubon Canyon Ranch, presents those findings and explains their significance in the context of the Pacific Flyway and global shorebird populations.