This bird, right at the Pacific shore in the resident area of Nuttall's, could be either that subspecies or Puget Sound. Sibley treats these two subspecies as indistinguishable in the field and lumps under the rubric "Pacific." But they often can be distinguished on the basis of sharpness of contrast of the back pattern (more sharp favors Puget Sound), the shade of gray of the underparts (lighter favors Nuttall's), and primary extension (short favors Nuttall's). See Don Roberson's discussion of these subspecies, and of this picture, the latter concluding that it leaves him undecided, at http://creagrus.home.montereybay.com/MTYbirdsWCSP3.html .