I'm not sure what kind it is, but it looks like a pale juvenile Western gull. But, it also looks like a juvenile Thayer's gull and a couple of other juvenile gulls that visit the coastal areas during the winter.
Western, Herring, and California juvenile gulls are usually a little darker and this one has a weird head, too.
UPDATE: The consensus on the gull is that it is a juvenile Glaucous-winged gull, which is unusual to see inland. Thayer's gulls are the same color, but have a smaller bill.
I thought I should add this photo of a young duck running away with a piece of tomato someone threw at her. The coots were trying to steal it from her. I thought she was Skippy, but I think it was one of the six babies I saw in early August:
I heard the killdeer, but did not see them. Also, one of the Pekin ducks is missing.
Sunday, I went on the short tour at the South Bay Salt Works in Chula Vista. I thought this was cool, it's bits of salt floating on the water. Sorta looks like ice:
There weren't that many birds around. A fair number of grebes were there, plus a few buffleheads:
Dowitchers and sandpipers: