40. North of 16th St. Station, Oakland a great many Larus philadelphia and a great number of sand- pipers were observed feeding in some shallow ponds and sloughs which were not affected by the tide, owing to the railroad embankment cutting them off. At Antioch one or two gulls, large gulls were noted - high tide. A Falco sparverius and, a Cathartes aura were seen flying over the rivers. Several Hirundo erythrogaster were observed flying about the river banks and two were sitting on the gig of the sch. "Academy." A Lanius ludovicianus was observed at the S.P. Co. Station. Between Antioch and Cornwall a large dark hawk was observed soaring about over the lowlands, both going and coming. Three Fulica americana were noted swimming about a pond beside the track and apparently feeding, as they kept dipping their bills into the water as they moved along. April 25, 1907.