Ground Hog Whistle

[Austy]

Does anyone know of a call for ground hogs??  I am looking for a call that will get the hogs to stand up and take a look around awaiting incoming fire!!!  I have been ask by someone if I could make them a hog whistle but I don't have any idea where to even start.  If anyone can help me out with some information I would appreciate the help, please send me a PM if you can help me out.
Thanks

Austy

[GOLD HUNTER]

get a whistle and blow on it ..........

[Cut*N*Run]

What would a hawk screamer do?