On today's morning walk with the dogs my ears pricked up when I heard an unfamiliar call. My first assumption was that a neighborhood starling had learned a new call--this wasn't their typical wolf whistle, but it was on their turf. I looked around, and the bird was conveniently in full view at the top of an oak, in full sun.
The bird was nearly robin-size, pearly gray, with yellow coming up the sides from its belly; it has a dark eye and pale under its eye, and a shortish, dark bill. (Mind you, I didn't have binoculars and the bird was 25 feet up.) I started thinking about olive-sided flycatcher or something in the same family.
After I finished the dog walk I went back with binoculars, but the bird was gone. Based on the field marks, though, it was a Western kingbird--the first one I've seen in my neighborhood. I'm more used to seeing them in open fields in the Central Valley, or in the cow pastures at Point Reyes.