雌马

• Females with young foals often have to live farther away from water now , which means that fewer of the foals survive to replenish the population
  雌马和年幼的马仔现在被迫生活在离水源地较远的地方，意味著能够存活下来的子代数量变少，不足以维持族群原有的数量。
• 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
  草原斑马、山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、有利生存的环境。