They can be called in northern MN, and I have done so no problem. However in this thick bush country there are too many variables that cause problems.
First Cougar I called in was near the Window Rock reservation in AZ many years ago. Watched it coming for a long way, like all cats they do goofy things.

Osky

A woman's heart is the hardest rock the Almighty has put on this earth and I can find no sign on it.