Isla Socorro, Islas Revillagigedo, Mexico.
Usually treated as conspecific with P. maculatus, but differs in its much smaller size (wing and tail 70·2 and 71·6 mm vs mean of one of each subspecies of P. maculatus 89·4 and 95·8; at least 3); dark brown vs blackish head, breast and back (2); greatly reduced white spotting on wings (1); smaller white tips to tail (1). Monotypic.
Socorro I, off W Mexico.
Food and feeding
Status and conservation
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