conditions:- Overcast; windy; moderate temperature As I rode down the street I saw a great many Passer domesticus. Along the marsh to the north of Bay Farm Island bridge I saw a few Hirundo erythrogaster. Along the Bay Farm Island Isawa few Melospiza cinerea and also a few barpodacus mexicanus. At the side of the road where the rubbish is dumped I saw some Hirundo erythrogaster and also some Petrochelidon lunifrons. In the road there were great flocks of Passer domesticus. On the beach on the south side of the island there were a few Nycticorax nycticorax. Along the beach just at the edge of the grass were great numbers of Petrochelidon lunifrons. They flew up as I approached. I saw one adroitly catch an insect, and then have a struggle in the air in preventing a hungry comrade from getting it. Far off over the marsh I saw a few Ardea erodias North end San Leandro Bay, Alameda, Cal. 3:30 P.M. to 5:00 P.M. Conditions: Overcast; windy, cold. When I jumped out of the boat on to the marsh near Melrose, the first birds I saw were a pair of Sterna magna which flew up from the marsh. Here also I saw several Nycticorax nycticorax and a few Ardea herodias. A flock of five or six Dimoces ledsa flew by me. Just too far off to distinguish what they were was a large flock