Dmax, ma gives you some great incite!The first sounds you heard for sure were "putts"!Sometimes low pressure birds can be quite curious!They knew something wasn't quite right but upon nothin chasing them there curiosity led them back to check you out!The clucks and purrs you were hearing upon there return were made to keep each other aware of where each of them were at, encouraging each other to keep there confidence up, and to keep there heads up cause they knew you were there!If you would have noticably moved at this point or made a threatening attempt to make them believe you were after them those clucks and purrs would have changed immediately back over to putts and once again they would have moved on!Intensity and situation in most cases dictates vocabulary in the world of turkey talk!!