It might still be in Guadalupe Island, 280 km west of Baja California. It was abundant in 1906, but the last record of a reproductive individual was in 1912. In searches conducted in 1922, 1925 and the early 70s was not recorded the species. However, no detailed study has been conducted since 1906. Its non-breeding distribution range is unknown.
Global population, if it exists, is estimated at less than 50 individuals.