They nest in scattered colonies. Both parents incubate the eggs with shifts of 3 days, generally shifts at night, to lessen the predation probability.
These birds breed from February to August in southern California and northwestern Baja California. They build their nests on hillsides, cliffs, canyons, crevices, holes or under dense thickets on arid islands; nests are natural cavities or excavations in soft ground, placed at a height of 35.7 m asl. The clutch size is 1 or 2 eggs pale blue, greenish or olive, with very different dark brown marks, measures 53 x 36 mm. The incubation period is about one month. The chicks are precocious and are born covered with down with a similar color pattern of adults; leave the nest after two days, accompanying to the adults toward the sea.