Western Scrub Jay or Aphelocoma californica
A rather scruffy-looking example of these birds. They're often referred to as Blue Jays, but that they're not. A true Blue Jay looks nothing like this bird.
NIKON CORPORATION NIKON D300, f/8 @ 800 mm, 1/250, ISO 400, No Flash
Lil Judd aka LilKnytt Photography (c)