Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: Yes. At least some populations of this species make annual migrations of over 200 km.
Seen along British Columbia, U.S. west coast, and in central Pacific during southward migration in late northern summer through winter (National Geographic Society 1983, Cogswell 1977, Pratt et al. 1987). Some nonbreeders remain off California during northern winter (National Geographic Society 1983).