I never heard that before! What do you call them?
MoFo or whatever comes to mind when I get busted by them or they bark at me unexpectedly especially at night.
I am going to try modifying an Elk bugle and cow caller. The diaphragm type can work but I am lousy with them, get a couple of good calls then blow a raspberry with them.
Ironically I have a sister in India now who just witnessed her guide mouth calling Chittal (Axis) and all sorts of other critters too. This was just yesterday, she is on the look out for calls but I doubt she will find one for me.