While the domestic horse and donkey exist worldwide, wild equine populations are scattered throughout Africa and Asia. Wild equine social systems come in two forms; a harem system with tight-kit groups consisting one adult male or stallion, two to several females or mares and their young or foals; and a territorial system where males establish territories with resources that attract females, which associate very fluidly. In both systems, females take care of their offspring but males may play a role as well. Human activities have threatened wild equine populations and out of the seven living species, only the plains zebra remains widespread and abundant.