Alpha - The top rank in the social order of the wolf pack. Since a separate social hierarchy exists for males and females, a pack has both an alpha male and an alpha female. They are usually the parents of most of the other members of the pack.
Beta - The second rank in the social order of a wolf pack. Since separate social hierarchies operate for males and females, a pack may have both a beta male and a beta female. A wolf at this rank will usually dominate all of the other wolves in its gender except the alpha wolf.
