How aggressive were you calling? Maybe shutting up and playing hard to get would be the ticket for this boy. If he was bellowing to every call you made, he might have been trying to get you to come to him. Soft clucks, silence, an occasional purr or scratching of leaves might have lured him in. I find that when I call to a bird and he gobbles after every yelp I make, they tend to hang up more.When I make random soft calls, not in response to his gobbling, or just scratch leaves, sometimes they can't stand it and start making their way closer.