I was walking dog and looking up at sky to see the local vultures flying around...saw one of the vultures and looked for the others..saw a plane in distance..followed the plane when I noticed a black object dome shaped top with square bottom..thought it was balloon but did not have shape or travel like a balloon...ran inside to call husband to see it and we observed it flying it a smooth path heading north, northwest over the trees until we lost sight of it..first reaction was wtf that's not a balloon.