The Grevy's Zebras keep to themselves and tend to be very aggressive towards other animals. Unlike other zebra species, they do not form permanent herds. Males generally live alone in their territories, except when females move through during mating season. Non-territorial males travel together in groups of two to six animals. This social system differs from that of other zebras, which typically form female flocks that live in one male's territory all year. During dry months, many Grevy's Zebras migrate to regions where they have more food supplies, but males often remain there year-round in their prime territories.