Why do some young gray wolves leave their birth packs?

Young gray wolves typically remain with their birth pack for two or more years before leaving. They depart primarily to search for a mate, establish their own territory, and potentially start a new pack of their own.12

While many young wolves choose to disperse, those that remain with their original pack may eventually replace a parent to become a breeding animal, or alpha. The size of a wolf pack is often influenced by these dispersal patterns; larger packs tend to form when fewer young wolves leave the group.12