These animals are just amazing.  I've been fortunate enough to camp and canoe numerous times in the Boundary Waters of Northern Minnesota.  Over the last number of years wolf packs have made a substantial come back in the North Woods.  They even have the International Wolf Center in Ely, Mn.  It's very much worth a visit if you get the opportunity.  If you've ever been lakeside around an evening campfire and and been serenaded by wolves calling out in the night, it's a thing you remember.  There is just something that pulls at your inner being when you listen to the mournful howl of a wolf.  The wolves that are going at it in this video were observed at the Wolf Creek Habitat in Brookville, Ind.  It really makes you wonder what they're saying, doesn't it?