The Ancient Murrelet (Synthliboramphus antiquus) has been recorded six times in Mexican waters, five times off the northwest coast and once off the southeast coast of the Baja California peninsula. The first record, and the only specimen, was of a bird taken near Ensenada on 25 December 1927 (Grinnell 1928). The second record was of a group of five seen near Islas Los Coronados on 24 February 1980 (McCaskie 1980, Erickson et al. 1995, Howell and Webb 1995), not 1975 as given by Wilbur (1987). An apparently unhealthy bird in first-year basic plumage was photographed at close range in Ensenada harbor on 9 January 1994 (Erickson et al. 1995). The following year, a group of three was observed west of Punta Arena near the southeast tip of Baja California Sur on 21 December 1995. These birds had “black bibs with white [plumage] behind” (Erickson and Howell 2001:126), suggesting individuals in their second year or older. This record is the most southerly of the Ancient Murrelet on the eastern coast of the Pacific Ocean. Nearly three weeks later, on 8 January 1996, one Ancient Murrelet was seen just north of Ensenada at El Sauzal harbor. Last, an individual was observed at Ensenada on 3 January 1998 (Erickson and Howell 2001).