Lions have a devised a system of living in groups called prides that’s based around related females. The majority of the pride, consisting of approximately 15 individuals and can sometimes even reach 40 individuals, is female with only a handful of male. Male cubs eventually leave and typically become nomads before taking over their own group as the territorial male and father of all cubs. They only leave the pride when challenged by other males and are forced to leave or are killed. Nomads usually travel lone or in pairs, most of the time being related males. If a female nomad attempts to join a pride, it is usually very difficult as the other lionesses reject their intruder who is not related to them.