DEC - 1 1904 San Leandro Bay and sloughs to south of S.P.b. track. 7:00 A.M. to 11:00 A.M. Conditions:- Rather overcast; moderate temperature; no wind. On looking out of the back window at about 6:30 A.M. I saw 3 gulls flying nearly overhead; they were headed NE. On San Leandro Bay gulls were rather common. I saw one or two Larus philadelphia. The remaining birds, about 30, were large gulls. I shot 3, 2 of which were immature Larus californicus, the 3rd an immature Larus argentatus, On my outward trip I saw a flock of about 30 ducks on the water a short distance NW of Grassy Pt. While tending to the gulls I shot in the mouth of San Leandro Slough, an Ochomorphus occidentalis passed quite close. Just as I reached for my gun the bird dived, coming up quite away ahead. South of the R.R. bridge on my way home saw one or two grebes (Leolymbus duritus ?) and one