i sure appreciate the suggestions.....it' s just hard to figure out because there is no property line, county,town, or any other line there.....its in the middle of the woods, in the middle of a farm. the only thing i could suggest and maybe this is a dumb answer but........the last orange strip we found was on a small tree that had been struck by lightning, and was surrounded by about 5-8 big pine trees that were dead possibly by beetles. Maybe the forestry service marks damaged tree areas or something....if thats not it i have no clue what is.