Cogswell 1948 Larus heermanni 1 Oct. 10 - San Pedro Point and Princeton, San Mateo Co., Calif. all birds of this species seen today (20+ total) were in the smooth gray, dark-headed plumage (= 2nd year birds ?). 1949 June 26 - Pescadero Point, Monterey Co., Calif. - many (100+) flying W -> N around point in early AM., all those seen being in full ad. plumage; as most of the few seen last week at Pacific Grove have been.