The photo of the line of pecked holes on the trunk of the oak is mine. I don’t think I could do be that precise with an electric drill and ruler.
The photo of the male red-naped sapsucker is from Cornell Lab All About Birds: https://www.allaboutbirds.org/guide/Red-naped_Sapsucker/id
Oh, and the field guide referred to above is: Finding Birds in Southeast Arizona from The Tucson Audubon Society. It’s in its eighth edition and it is to die for if you are an amateur (me) or expert birder.
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