NatureServe Conservation Status
Rounded Global Status Rank: G1 - Critically Imperiled
Reasons: Two breeding colonies (Guadalupe Island, Isla San Benito del Este, Mexico); formerly, breeding probably occurred also on islands along the California coast; restricted range is due to near extermination by excessive harvest; current population of 7,000+ is increasing.
Other Considerations: Presumed extinct after 19th century commercial harvesting. Rediscovered (1949) on San Nicolas Island, California.