The turkey "gronk" call...does it exist?

[Tail Feathers]

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.

[archery1]

Turkey Gas!!

He just ate too much.  :funnyturkey

[RIStrutStopper]

Maybe that turkey was a New England Patriots fan? I hear lots of them saying "Gronk" after an exceptional reception...