Year's ago, I discovered that if I whistled a certain way to my friend's domestic turkeys, they would gobble. I thought it was a fluke until I tried it again in several different situations - the Phoenix zoo, for example. It works almost every time I try it. While in Maine last week, my father-in-law's hospice always had a bunch of wild turkeys hanging around. I opened the window and whistled - voila - it worked on them too! I guess - what behavior is it, that makes them respond to the whistle like that? (as opposed to "typical" turkey calls/sounds) Would that whistle have any use while hunting turkeys?