Found by Alvaro Jaramilo. There are four previous records of Laughing Gull for San Mateo County as follows:
3 February 1998 - Winter adult at Pillar Point (Doug & Donna Pomeroy)
5-7 June 1998 - Adult at Pescadero Creek Mouth (Bert McKee et al. photo)
11 September 1999 - Adult at Pebble Beach (Adam Winer)
10 June 2004 - Immature at Pescadero Creek (Benjamin D. Parmeter, Alan Wight, J. R. Blair) - Photos by Wight
See Parkes (1952) for recognition of L. a. megalopterus.
Panasonic DMC-LZ5 / Nikon FS 3 / 30XWA / hand-held, no adapter.