“Wolves have a better chance of a successful hunt if they have harmony within the pack. And the glue that binds the pack together is a complex array of body language and sounds that communicate mood, status and hierarchy.”
Get a rare peek at the social, ecologically essential, and often-persecuted wolf, specifically these Eurasian or Carpathian wolves filmed in a Romanian forest in the Carpathian Mountains. They communicate through low wagging tails, crouching, licking, jaw wrestling, muzzle biting, and rolling on the ground, all while growling, whining, yipping, and yowling.
This Smithsonian Channel video is a clip from Carpathian Predators: Realm of the Wolf.