Despite Baja California’s proximity to heavily birded southern California, its avifauna remains surprisingly poorly known. The paucity of data regarding birds in Baja California was highlighted by Wilbur (1987). In particular it is apparent that few ornithologists have studied Baja California in summer, i.e., the period between a species’ spring and autumn migration periods. For example, the occurrence in June 1991 of summering Common (Gavia immer) and Pacific (G. pacifica) loons, Great Egrets (Casmerodius albus), Greater Yellowlegs (Tringa melanoleuca), Long-billed Curlews (Numenius americanus), Short-billed Dowitchers (Limnodromus griseus), and California Gulls (Larus californicus), all seen at Bahía San Quintín, would barely be worth noting had they been in southern California, yet there appear to be no previous published summer records for these species in Baja California! [Llinas et al. (1989) and Escofet et al. (1988) did not specifically distinguish oversummering individuals, and the former’s definition of “summer” more accurately reflects autumn for shorebirds.