Psaltriparus minimus
The Bushtits have discovered the suet feeder, and make daily passes through the area. This one appears to be a female, based on her yellow iris.
Today was also the first day of the "Great Backyard Bird Count," so my photo time doubled as bird-counting time. In all, over a couple of hours of watching, we had 13 different bird species visit (or fly over in the case of a Raven), including American Robins, Collared Doves, Downy Woodpecker, Northern Flicker, Juncos (Oregon, Pink-Sided, Gray-Headed), House Finches, Pine Siskins, American Goldfinches and House Sparrows.