My house is cedar, and I have both Flickers and Sapsuckers hammering away. I can see rows of symmetrical square holes up high, below the eaves.
They also dig into the horizontal cedar boards that are above garage doors. Why?? Because all the borer bees (carpenter bees) nest there by boring holes that are 3/8” in diameter and go an inch up and then take a right turn. There are piles of sawdust on the driveway apron.
Then the Sapsuckers hear the rustling of the Bee larvae and gouge away long strips of cedar in order to retrieve lunch.
Something is partial to hammering on the asphalt roof shingles, too. (Note comma.) I have huge holes in trees and stumps throughout my woods, probably caused by Pileated, whom I can hear.