March 9, 1910. San Leandro Bay and sloughs to northeast, Alameda county, california. conditions: Foggy in early morning. Warm; clear; light winds remainder of day. Terns. A few, probably Sterna forsteri. Gulls. A few. Shot one immature Larus argentatus. Squatarola helvetica. Common at low tide. Just as soon as the first mud is exposed shore birds begin to appear. At high tide an occasional flock of sandpipers is seen. Macrorhamphus griseus. Common. Two I shot are beginning to show summer plumage. Creunetes pusillus. Shot one from flock. Sandpipers were abundant. All the others I shot were Pelidna alpina, which were in flocks of good size. I presume Limonites minutilla was present although I shot none. Ardea herodias. Several. Ducks. Common in San Leandro Bay, few in sloughs. Scarp Ducks and Clangula clangula recognized. Phalacrocorax auritus. Quite a few. Roost on stakes, Asio accipitrinus, one; Circus hudsonius, one; Otocorys alpestris, several; Ayelaeus phoeniceus in large flocks; Sturmella magna, a few.