How do bachelor herds differ from family groups of elephants?

Elephant social structures are defined by a clear separation between the sexes as they reach maturity. The differences between family groups and bachelor herds are as follows:

• Family Groups: These are stable, female-led units known as matriarchies. They consist of related females of all ages and their immature male offspring. A matriarch—typically the oldest and largest cow—leads the group, utilizing her experience to guide the herd in finding food, water, and migration routes. Females remain in their natal herds for their entire lives, where they collectively nurture the young.123

• Bachelor Herds: Upon reaching sexual maturity in their second decade, male elephants leave their natal herds. These bulls then live either as solitary individuals or join small, transient bachelor herds with other males. Unlike the stable, multi-generational family units, these male groups are less permanent, though males may form short-lived associations with females for mating or feeding. During their prime, males also experience a state called musth, which helps establish reproductive hierarchies.132