From citizen-times.com:

Wolves have a variety of reasons to communicate, whether it’s finding a mate, establishing rank within a pack, or showing affection. Even though wolves don’t communicate using spoken words, they definitely have many ways to “talk” to each other. Most of these ways involve body language, and wolves do use their entire bodies! Tails, ears, eyes, posture and more all play a factor in delivering a message to a fellow pack member.

Wolf packs have a hierarchy, meaning certain wolves are more dominant than others within the pack.

Click here for full article.