I know it's frustrating when birds hang up. You might try shutting up and scratching in the leaves. Maybe purr and lightly cluck a little. Once the bird shuts up, it's hard to stay seated, but sometimes he will eventually come in. If he doesn't and it's morning, try setting up in the same spot later in the day and calling. Any date he got might have left him and he may remember you. I know there's a lot of mights and mays in the above, but I still have not figured the darn things out. Hang in there and you will kill one.