Any idea as to the species? Some sort of Flycatcher/peewee/vireo? There's a pair of 'em building a nest in a cedar tree in the back yard. They almost look like mini mockingbirds, but are smaller than a house finch. They don't sit still for very long so it's been hard getting good pictures.
I live in San Jose, CA. if it helps.
...and its name isn't Bob or Sidney.