Black-and-White Warbler, Mniotilta varia
Black-and-White Warbler is an eastern species, found irregularly in fall and winter in the Bay Area. This one was seen by many local birders around Christmas time, 2006, in the sycamores along Penetencia Creek in eastern San Jose. It is a first-winter male, which closely resembles a female in breeding plumage -- no black on the breast, heavy streaking on the sides, where a first-winter female would have less distinct streaks.