Orange Bishop , Euplectes franciscanus
Orange Bishops, pair, 10/13/06, Stevens Creek north of 101
These birds, native to sub-Saharan Africa, are popular pets; as escapees they have established small wild breeding populations from Southern California  north through the Bay Area. They aren't yet recognized as a North American wild bird species, but may be someday soon. They are in the family of the weavers, Ploceidae, and related to the old world sparrows (Passeridae) and weaver-finches (Estrildidae). The male, shown here in October, will shortly lose its spectacular breeding plumage and resemble the Grasshopper-sparrow-like female. I haven't found another pair photo of the species on the web.
Orange Bishop, male, 10/13/06, Stevens Creek north of 101