My cousin whom I well love and her husband lived in New Mexico now dozens of years ago and told, over the years, about the beings in the attics. Her sister and bro in law agreed, both men engineers, in the old sense of the term, and who were there for the birth in the first place. I know their faces, they weren't kidding. There was a religion aspect.
Well, y'all know me. I take it as structural sounds from wind plus air making stuff happen.