Arenaria interpres. Half a dozen or so in sloughs, where they seemed to frequent the harder mud banks. Seemed to be in pairs as didales the Aegialites semipalmatus. Shot three. Squatarola helvetica. Perhaps a score seen altogether. Mostly all black-bellied. Wary as usual. Aegialites semipalmatus. Quite a few. Chrimenus hudsonicus. Probably the common bird of all. Macrorhamphus gryllus. Perhaps a dozen or so. Eremetes persillius. Common. Mostly in threes and fours in sloughs. Flocks of moderate size seen outside on beach. Pelidna alpina. About a score. Ardea herodias. One Nycticorax nycticorax. Several. Two or three distant ducks. In marsh Melospiza cinerea and red- winged blackbird, presumably Agelaius phoeniceus. The latter had sort of a song flight, rising up from the marsh for twelve or thirteen feet by flapping wings and then descending with an abrupt sail, singing during the downward flight, making a note like Geospiza crassirostris. May 5, 1911. Alameda, California. (Through the slough to the south side of Bay Farm Island.