达尔文蛙见于南美洲大部分地区，它们抚育幼蛙的方式与众不同。达尔文雌蛙产下卵后，雄蛙用舌头把卵卷起咽到声囊里，之后雄性达尔文蛙则继续进食。当蝌蚪长到没有尾巴时，雄蛙便张开嘴，让蝌蚪们跳出去。
　　
    奇异的雄海马——生育子女

　　
　　Sea horse（海马）:The male sea horse has a pouch in which the mother lays her eggs. The father then looks after the eggs for about two months, until they hatch and leave the pouch. He continues to protect the young until they are able to live on their own.