Cape San Lucas, Baja California.
Sometimes placed in Brachyramphus or in Endomychura. Sympatric (as is S. scrippsi) with closely related S. craveri at San Benito Is (Baja California), where further study required in order to determine degree of mixing and gene exchange; may be conspecific with S. craveri. Often considered conspecific with S. scrippsi. Proposed race pontilis considered untenable. Monotypic.
Offshore rocks and islands of NW Baja California (San Benito Is, Guadalupe I); status on San Martín I, Baja California, and San Clemente I and Santa Barbara I (Channel Is), off S California, uncertain#R#R. Winters offshore presumably within the breeding range along the Pacific coast of Baja California, rarely further north.
Food and feeding
Status and conservation
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