草原斑马、斑马和野马组成的群体就是属于上述的后宫系统，这通常可以提供雌马和马仔一个相对稳定、利生存的环境。

• The harem strategy, generally followed by plains and mountain zebra as well as by feral horses, often provides a relatively safe environment in which mothers and their foals can thrive.