Palacios and Mellink (1992, 1993) have reported on the breeding birds of Isla Montague, northern Gulf of California. Here, we report additional breeding species detected during the 1993 breeding season.Black Skimmer (Rynchops niger). Black Skimmers are locally common year-round in northwestern Baja California and are increasing their numbers on the peninsula (Palacios and Alfaro 1992).