Years back Murry Burnham had a mountain lion tape he made for calling them . They are cats and like bobcats or feral cats they move slow and with a purpose for each and every step . So often you will have them within range and not see them , they blend in well and don't move fast , people will walk past them often and not know they did , or they will call them and not realize it . It is one of the times that an hour on the stand might not produce results for you , the volume is important , they will circle around behind you like bobcats do and may land beside you from the top of a cut bank or large rock if you are using to much volume . I have had them set behind me and make a low murmuring growl that will make your skin crawl , error on the side of caution use a low volume , look for something that wasn't there when you started calling or a slow movement , a bump on a hill , knob or higher elevation . Make all of your movements slow and with a reason when you do move . When you are done with your stand don't just get up and leave your stand site , sit look listen , they don't make much if any noise , for several minutes then move slowly out of your position stand and survey the area all around you 360 degrees . A lot of people that I know have seen their tracks in snow where they came in and sat down behind them then left while they were still calling , as they left to go back to their truck .