This is a male Acorn Woodpecker.  Notice that the red feathers on its head do touch the white feathers and there is no band of black feathers between them.  As their name implies, acorns are an important food source for these birds, especially in winter.  In fall, the woodpeckers drill holes in the bark of trees and store ripe acorns in these holes.  Notice there are several acorns on the underside of this branch.  However, check out the next photo!