It is possible that another bird was there but I doubt it.
I had been in the spot for a couple of hours and the birds flew up about forty yards behind my spot on a field edge. The 13 turkeys I heard fly up would have likely spooked a raven off, or so I would think. The kind of flew up in a line from west to east about 40 yards off the edge of the field on a hillside behind me.
It sounded to me as if the last bird up did the "gronk".
Could it have been a raven? Possible but doubtful. I just don't think one would sit still in a tree while all those turks flew up close to it.
As I said, could have been a turkey burp or honking a turkey loogie for all I know.
