Chestnut-backed Chickadees. They are common to the Pacific Coast and are year-round residents.
This shot is paler; it was taken through a window
Redbreasted Nuthatch. They are year-round residents across lower Canada. The range map shows them resident year-round in eastern Arizona and also in winter in western Arizona, but I've never seen one before. They were one of the most frequent visitors at this bird feeder, but didn't stay still long enough to be easily photographed.