The Northern Flicker is in the woodpecker family, common from Alaska to Newfoundland. It is a migratory species, and is sometimes spotted visiting our desert mountains, including the Santa Rita Mountains and Madera Canyon south of Tucson.
This is a medium sized woodpecker, with black to brown bars on the back, and spotted undersides. There is a black crescent on the breast. The gray face is topped with a brown crown and head, with a red slash at the corners of the mouth. There are two races of this species, one with a red slash, and the other with a yellow one.
The Northern Flicker is notorious for using metal rather than trees to notify potential mates of its presence. If you have a bird constantly drumming on your fireplace or wood stove pipe, chances are it is this bird.
Reference: The Nature of Madera Canyon by Douglas W. Moore, Friends of Madera, 1999; whatbird.com