Gray Flycatcher (Empidonax wrightii), Lindo Lake, San Diego County, California - 15 October 2013. This bird was dipping it's tail phoebe-like. No vocalizations.
The most common empid to be found in this location at this time of year. Always observe the downward tail pumping a bit like a phoebe to assist with the ID.
First heard its 'wit' call and then zeroed in on the bird to observed its behavior, dipping its tail downward when perched, similar to a phoebe. The most expected empid in this location at this time of year.