Perusal of the literature indicates a lack of records of the Magnificent Frigatebird (Fregata magnificens) in San Bernardino County, California. Phillips, Marshall and Monson (1964) noted the occurrence of frigatebirds (Fregata sp.) at Lake Havasu, Mohave County, Arizona. Although Lake Havasu borders San Bernardino County, Cardiff (1963) did not include any frigatebird in his review of the avifauna of the county. More recently, McCaskie (1976a) reported a Magnificent Frigatebird over Grand Terrace, located approximately on the Riverside-San Bernardino County line. Additional frigatebird sightings in southern California and in the vicinity of the Colorado River in Arizona and Nevada are discussed by McCaskie (1970), Lawson (1973, 1977) and Speich and Witzeman (1975).