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: No. No populations of this species make annual migrations of over 200 km.
Details of migrations are poorly known. Year-round resident thoughout much of range, but generally moves north for summer, south for winter. Migrations into Bering Sea may occur spring though fall. Inshore movements may augment populations off California in winter and spring (Leatherwood and Reeves 1983).