Reimsen, J.V. 1973 Heermann's Gull Larus heermanni July 6 Little Merced beach, San Francisco Co., Calif : 20 Rockaway Beach, s. of Pacifica, San Mateo Co., Calif: 100, most in groups of 10 -> N , mostly ads. Moss Beach, San Mateo Co., Calif: 200, again many groups of adults going N, Princeton Harbor, San Mateo Co., Calif : 200, several groups of 5-10 harassing feeding Brown Pelicans. One unsuccessfully tried to steal fish from a Caspian Tern Pescadero Beach, San Mateo Co., Calif: 30 Ana Nuevo Pt., San Mateo Co., Calif: 15 July 14 Bolinas Lagoon & Bay, Marin Co., Calif : 75, mostly adults. Aug. 5 Bay Bridge Toll Plaza, Alameda Co., Calif : 5 Bodega Harbor, Sonoma Co., Calif : 10 Point Reyes N.S., Marin Co., Calif : 7 Aug.31 Bolinas Lagoon: 50 Point Reyes N.S.: 5 Sep.2 Bay Bridge Toll Plaza: 2 sub-ad. Pescadero Beach: 100 (all sub-ads) Rodeo Lagoon, Marin Co., Calif : 15 " Sep.16 San Diego offshore boat trip: 2j Sep.18 Monterey area, Monterey Co., Calif : 100 imm. Moss Landing, Monterey Co.: 100 imm. Sep.21 Pescadero Beach : 100 Sep.22 Monterey Bay boat trip: 50 Monterey area : 200 Sep.23 Monterey area: 100 sub-ads Ana Nuevo: 100 sub-ads. Sep.25 Rodeo Lagoon: 20 Sep.27 Heermann! Monterey area, Monterey Co., Calif : 400 Moss Landing : 100 Pescadero Beach : 10 Sep.29 Eureka area, Humboldt Co., Calif : 5 Sep.30 Eureka boat trip: 25