You should never approach one of these camouflaged carcasses because the animal may not be far away. Bears and cougars will defend these partially eaten carcasses. Wolf packs may or may not, but it's best not to take the chance. Wolves have a complex vocal communication system. They use yelps, whines, growls and body language to communicate amongst themselves.
Posture is used to indicate the wolf's position in the pack.
Submission to a dominant pack member is indicated by a cowering stance and whining. The submissive wolf will lick the dominant wolf's face. A wolf will growl, snarl, lay back its ears, and raise the hair on its back to let another wolf know to back off. Wolf howling serves as a communication between the entire pack. Wolves tend to give long howls instead of the yapping calls that coyotes are known for.