Alameda to and from San Francisco, Cal. Conditions: - Clear; NW wind; moderate temperature. Along the mole Scap ducks and scoters (apparently all Oidemia perspicillata) were quite still in evidence. Near the roundhouse at low tide this morning were a great many gulls, mostly adult Larus californicus, and also immature Larus glaucescens. At the Alameda mole both in the morning and evening there were several immature Larus glaucescens on the piles; they let the boat pass very close without flying. In the morning I noted two asleep with heads thrown over shoulder out the back. In the evening Larus californicus intermingled with a few immature Larus glaucescens followed the steamer abundantly. Quite often one of the former species is heard to give a few high notes and once or twice I have heard one give a high cackling call, much shriller than that of Larus fuliginosus. Apr. 5, 1907.